Journal articles: 'Nanoparticles - Functional Properties'

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Reijnders, L. "Safe Functional Modified CuO Nanoparticles?" Applied Sciences 13, no. 6 (March 8, 2023): 3425. http://dx.doi.org/10.3390/app13063425.

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CuO nanoparticles produced by methods from inorganic chemistry and physics are applied as biocides and applications thereof in solar stills, solar collectors, catalysis, sensing and diesel fuels have been proposed. Such CuO nanoparticles are hazardous due to the release of Cu ions and the induced generation of reactive oxygen species after uptake by organisms. Nanoparticle hazard may be reduced by surface modification (coating or capping) and doping which reduces the release of Cu ions and the generation of reactive oxygen species. None of the published safe-by-design modifications of CuO nanoparticles that will be discussed here have been proven safe (no risk). By targeting the release of Cu ions and the generation of reactive oxygen species by CuO nanoparticles, safe(r)-by-design studies target properties that underly the biocidal functionality of CuO nanoparticles. Other functionalities of CuO nanoparticles may also be impacted. There is a case for complementing safe(r)-by-design studies by investigating the impact of the modifications studied on CuO nanoparticle functionality.

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Abd El-Aziz, Eman, Menna Zayed, Amina L. Mohamed, and Ahmed G. Hassabo. "Enhancement of the Functional Performance of Cotton and Polyester Fabrics upon Treatment with Polymeric Materials Having Different Functional Groups in the Presence of Different Metal Nanoparticles." Polymers 15, no. 14 (July 14, 2023): 3047. http://dx.doi.org/10.3390/polym15143047.

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This work examined the functional properties of three different treated fabrics, cotton, polyester, and cotton/polyester, with different polymeric materials (polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), or chitosan) in the presence and absence of two synthesized metal nanoparticles to impart and enhance fabric properties. Both metal nanoparticles (silver nanoparticle (AgNPs) and Zinc oxide nanoparticles (ZnONPs)) were synthesized using Psidium guajava Leaves and characterized using different techniques. The different treated fabrics were dyed with Reactive Dye (Syozol red k-3BS) and evaluated for their color strength, fastness properties, ultraviolet protection, antimicrobial activity, and mechanical properties. Results showed that treatment with polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), or chitosan enhances the functionality of all fabrics, with improved color strength, UV protection, and antimicrobial properties. Additionally, mechanical properties were slightly increased due to the creation of a thin film on the fabric surface. All dyed treated fabrics showed good ultraviolet protection and antimicrobial properties. The K/S of all treated textiles including nanoparticles and polymers was marginally greater than that of the treated materials without polymers. The UPF values demonstrate that the three investigated polymers and both metal nanoparticles enhance the fabrics’ ability to block UV radiation and shield people’s skin from its damaging effects. All treated textiles had UPF values that are higher than those of untreated textiles. Further research demonstrates that ZnONP-treated textiles exhibited greater UPF values than AgNP-treated textiles when the polymer component was present. Antibacterial examination demonstrated that treated materials had robust microbial resistance. This resistance is diminished by washing, but still prevents bacterial growth more effectively than untreated textiles.

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Wang, Yung-Chen, Eric Yi-Tong Chen, Chi-Shuo Chen, Albert Sun, and Wei-Chun Chin. "Mucus Rheological Properties Altered by Functional Nanoparticles." Biophysical Journal 98, no. 3 (January 2010): 401a. http://dx.doi.org/10.1016/j.bpj.2009.12.2163.

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Yang, Zhang-You, Sheng-Lin Luo, Hong Li, Shi-Wu Dong, Jian He, Hong Jiang, Rong Li, and Xiao-Chao Yang. "Alendronate as a robust anchor for ceria nanoparticle surface coating: facile binding and improved biological properties." RSC Adv. 4, no. 104 (2014): 59965–69. http://dx.doi.org/10.1039/c4ra12007h.

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Minh, Nguyen Viet, Vu Ngoc Tuoc, and Le Thi Hong Lien. "Density Functional Based Tight Binding Study on Wurtzite ZnO Prismatic Nanoparticles." Communications in Physics 21, no. 3 (September 19, 2011): 235. http://dx.doi.org/10.15625/0868-3166/21/3/173.

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We have performed the Density Functional Tight Binding (DFTB) study on the structural properties of Zinc Oxide Nanoparticles (NP), focusing on the effects induced by the surfaces and quantum size effect. Effects of surface relaxation and surface stress which is absent in atomistic model are taken carefully into account. The studying Nanoparticle size range up to 2.3nm. We illustrated the structural properties changes by decreasing NP sizes while the typical length of surface relaxation (about 1nm) remain unchanged and comparable with the particle size. The NP electronic properties, i.e. Density of State (DOS), charge transfer in hetero-bond also showed the deviation from bulk material value.

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Levratovsky, Y., and E. Gross. "High spatial resolution mapping of chemically-active self-assembled N-heterocyclic carbenes on Pt nanoparticles." Faraday Discussions 188 (2016): 345–53. http://dx.doi.org/10.1039/c5fd00194c.

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The properties of many functional materials critically depend on the spatial distribution of surface active sites. In the case of solid catalysts, the geometric and electronic properties of different surface sites will directly impact their catalytic properties. However, the detection of catalytic sites at the single nanoparticle level cannot be easily achieved and most spectroscopic measurements are performed with ensemble-based measurements in which the reactivity is averaged over millions of nanoparticles. It is hereby demonstrated that chemically-functionalized N-heterocyclic carbene molecules can be attached to the surfaces of Pt nanoparticles and utilized as a model system for studying catalytic reactions on single metallic nanoparticles. The formation of a carbene self-assembled layer on the surface of a Pt nanoparticle and its stability under oxidizing conditions were investigated. IR nanospectroscopy measurements detected the chemical properties of surface-anchored molecules on single nanoparticles. A direct correlation was identified between IR nanospectroscopy measurements and macroscopic ATR-IR measurements. These results demonstrate that high spatial resolution mapping of the catalytic reactivity on single nanoparticles can be achieved with this approach.

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Chiew, Cerwyn, Maria J. Morris, and Mohammad H. Malakooti. "Functional liquid metal nanoparticles: synthesis and applications." Materials Advances 2, no. 24 (2021): 7799–819. http://dx.doi.org/10.1039/d1ma00789k.

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Sonication and mechanical shearing are scalable processes for creating liquid metal nanoparticles. Optimizing the involved processing parameters is crucial for achieving the desirable structure, surface properties and applications of these nanoparticles.

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Song, Xiaolei, Congzhu Xu, Wendong Yao, Jieyun Wen, Qufu Wei, Yonggui Li, and Xinqun Feng. "Study on the Controllable Preparation of Nd3+ Doped in Fe3O4 Nanoparticles for Magnetic Protective Fabrics." Molecules 28, no. 7 (April 3, 2023): 3175. http://dx.doi.org/10.3390/molecules28073175.

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Magnetic protective fabrics with fine wearability and great protective properties are highly desirable for aerospace, national defense, and wearable protective applications. The study of the controllable preparation method of Nd3+ doped in Fe3O4 nanoparticles with supposed magnetic properties remains a challenge. The characterization of the microstructure, elemental composition, and magnetic properties of NdFe2O4 nanoparticles was verified. Then, the surface of NdFe2O4 was treated with glyceric acid to provide sufficient –OH. Subsequently, the connection of the nanoparticle by the succinimide group was studied and then grafted onto cotton fabrics as its bridging effect. The optimal loading rate of the functional fabrics with nanoparticles of an average size of 230 nm was 1.37% after a 25% alkali pretreatment. The color fatness to rubbing results showed better stability after washing and drying. The corresponding hysteresis loop indicated that the functional fabrics exhibited typical magnetism behavior with a closed “S” shape and a magnetic saturation value of 17.61 emu.g−1 with a particle size of 230 nm. However, the magnetic saturation value of the cotton fabric of 90 nm was just 4.89 emu.g−1, exhibiting controllable preparation for the aimed electromagnetic properties and great potential in radiation protective fields. The electrochemical properties of the functional fabrics exhibited extremely weak electrical conductivity caused by the movement of the magnetic dipole derived from the NdFe2O4 nanoparticles.

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Mochizuki, Chihiro, Junna Nakamura, and Michihiro Nakamura. "Development of Non-Porous Silica Nanoparticles towards Cancer Photo-Theranostics." Biomedicines 9, no. 1 (January 13, 2021): 73. http://dx.doi.org/10.3390/biomedicines9010073.

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Nanoparticles have demonstrated several advantages for biomedical applications, including for the development of multifunctional agents as innovative medicine. Silica nanoparticles hold a special position among the various types of functional nanoparticles, due to their unique structural and functional properties. The recent development of silica nanoparticles has led to a new trend in light-based nanomedicines. The application of light provides many advantages for in vivo imaging and therapy of certain diseases, including cancer. Mesoporous and non-porous silica nanoparticles have high potential for light-based nanomedicine. Each silica nanoparticle has a unique structure, which incorporates various functions to utilize optical properties. Such advantages enable silica nanoparticles to perform powerful and advanced optical imaging, from the in vivo level to the nano and micro levels, using not only visible light but also near-infrared light. Furthermore, applications such as photodynamic therapy, in which a lesion site is specifically irradiated with light to treat it, have also been advancing. Silica nanoparticles have shown the potential to play important roles in the integration of light-based diagnostics and therapeutics, termed “photo-theranostics”. Here, we review the recent development and progress of non-porous silica nanoparticles toward cancer “photo-theranostics”.

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Varma, Lanke Tejesh, Nidhi Singh, Bapi Gorain, Hira Choudhury, Murtaza M. Tambuwala, Prashant Kesharwani, and Rahul Shukla. "Recent Advances in Self-Assembled Nanoparticles for Drug Delivery." Current Drug Delivery 17, no. 4 (June 27, 2020): 279–91. http://dx.doi.org/10.2174/1567201817666200210122340.

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The collection of different bulk materials forms the nanoparticles, where the properties of the nanoparticle are solely different from the individual components before being ensembled. Selfassembled nanoparticles are basically a group of complex functional units that are formed by gathering the individual bulk components of the system. It includes micelles, polymeric nanoparticle, carbon nanotubes, liposomes and niosomes, <i>etc</i>. This self-assembly has progressively heightened interest to control the final complex structure of the nanoparticle and its associated properties. The main challenge of formulating self-assembled nanoparticle is to improve the delivery system, bioavailability, enhance circulation time, confer molecular targeting, controlled release, protection of the incorporated drug from external environment and also serve as nanocarriers for macromolecules. Ultimately, these self-assembled nanoparticles facilitate to overcome the physiological barriers <i>in vivo</i>. Self-assembly is an equilibrium process where both individual and assembled components are subsisting in equilibrium. It is a bottom up approach in which molecules are assembled spontaneously, non-covalently into a stable and welldefined structure. There are different approaches that have been adopted in fabrication of self-assembled nanoparticles by the researchers. The current review is enriched with strategies for nanoparticle selfassembly, associated properties, and its application in therapy.

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Ignjatovic, Nenad, Smilja Markovic, Dragana Jugovic, and Dragan Uskokovic. "Molecular designing of nanoparticles and functional materials." Journal of the Serbian Chemical Society 82, no. 6 (2017): 607–25. http://dx.doi.org/10.2298/jsc1612070011i.

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The interdisciplinary research team implemented the program titled ?Molecular designing of nanoparticles with controlled morphological and physicochemical characteristics and functional materials based on them? (MODENAFUNA), between 2011 and 2016, gaining new knowledge significant to the further improvement of nanomaterials and nanotechnologies. It gathered under its umbrella six main interrelated topics pertaining to the design and control of morphological and physicochemical properties of nanoparticles and functional material based on them using new methods of synthesis and processing: 1) inorganic nanoparticles, 2) cathode materials for lithium-ion batteries, 3) functional ceramics with improved electrical and optical properties, 4) full density nanostructured calcium phosphate and functionally-graded materials, 5) nano-calcium phosphate in bone tissue engineering and 6) biodegradable micro- and nano-particles for the controlled delivery of medicaments.

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Jiménez-Rosado, Mercedes, Víctor Perez-Puyana, Pablo Sánchez-Cid, Antonio Guerrero, and Alberto Romero. "Incorporation of ZnO Nanoparticles into Soy Protein-Based Bioplastics to Improve Their Functional Properties." Polymers 13, no. 4 (February 4, 2021): 486. http://dx.doi.org/10.3390/polym13040486.

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The union of nanoscience (nanofertilization) with controlled release bioplastic systems could be a key factor for the improvement of fertilization in horticulture, avoiding excessive contamination and reducing the price of the products found in the current market. In this context, the objective of this work was to incorporate ZnO nanoparticles in soy protein-based bioplastic processed using injection moulding. Thus, the concentration of ZnO nanoparticles (0 wt%, 1.0 wt%, 2.0 wt%, 4.5 wt%) and mould temperature (70 °C, 90 °C and 110 °C) were evaluated through a mechanical (flexural and tensile properties), morphological (microstructure and nanoparticle distribution) and functional (water uptake capacity, micronutrient release and biodegradability) characterization. The results indicate that these parameters play an important role in the final characteristics of the bioplastics, being able to modify them. Ultimately, this study increases the versatility and functionality of the use of bioplastics and nanofertilization in horticulture, helping to prevent the greatest environmental impact caused.

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Tsehmistrenko, O. "The Biological methods of selenium nanoparticles synthesis, their characteristics and properties." Tehnologìâ virobnictva ì pererobki produktìv tvarinnictva, no. 2(158) (November 24, 2020): 6–20. http://dx.doi.org/10.33245/2310-9289-2020-158-2-6-20.

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Nanotechnologies have an impact on every sphere of life, change approaches to environmental recovery, introduce new methods of disease analysis and prevention, treatment, drug delivery and gene therapy, affect the provision of environmentally friendly alternative energy sources, increase crop yields, animal and poultry productivity. Physical, chemical, biological methods of synthesis of nanoparticles, selenium in particular, their properties and the factors participating in reduction of metal ions to nanoparticles are considered. Limitations of nanoparticle synthesis inherent in the biological method (identification and isolation of bioactive fragment responsible for biomineralization of metal ions, analysis of ways to develop individual nanoparticles) and factors contributing to the intensification of nanoparticle production (optimization of pH, temperature, contact time, mixing degree) changes in the total charge of functional organic molecules on the cell wall). It has been proved that these factors affect the size, morphology, composition of nanoparticles and their efficiency during the synthesis. The model of green synthesis with the use of physicochemical means and their biomedical applications have been summarized. There are organisms used for the synthesis of NPs - terrestrial and marine bacteria, bacterial extracellular polymeric substances as bioreductants, fungi, yeast, algae, viruses, microorganisms. It has been demonstrated the biochemical ways of microorganisms in order to fight the toxicity of metals during the synthesis of nanoproducts and the factors that determine the toxicity of metals that are converted into nanoparticles (size, shape, coating agent, nanoparticle density and type of pathogen). The biological role of selenium and features of its influence on an organism in a nanoscale scale are shown. Key words: nanotechnologies, nanoselenium, bacteria, green synthesis, enzymes.

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Sharma, Naveen, Ganesh Bhatt, and Preeti Kothiyal. "Gold Nanoparticles synthesis, properties, and forthcoming applications : A review." Indian Journal of Pharmaceutical and Biological Research 3, no. 02 (June 30, 2015): 13–27. http://dx.doi.org/10.30750/ijpbr.3.2.3.

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Gold nanoparticles (AuNPs) have several biomedical applications in diagnosis and treating of disease such as targeted chemotherapy and in pharmaceutical drug delivery due to their multifunctionality and unique characteristics. AuNPs can be conjugated with ligands, imaging labels, therapeutic drugs and other functional moieties for site specific drug delivery application. In this present review we are discussing the synthesis, properties, and forthcoming applications of gold nanoparticle (AuNPs) which is the most studied among all other metallic-nanoparticles. Here our main focus is to explain the AuNPs application in cancer treatment. AuNPs provides non-toxic carrier system for pharmaceutical drug and gene delivery applications. Currently various anticancer drugs are available but these are cause the necrosis of cancerous cell as well as normal cells. AuNPs cause the necrosis of only cancer cells therefore we can utilize it as a delivery vehicle as well as anticancer agent

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Liu, Guangyang, Meng Lu, Xiaodong Huang, Tengfei Li, and Donghui Xu. "Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening." Sensors 18, no. 12 (November 27, 2018): 4166. http://dx.doi.org/10.3390/s18124166.

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Due to their unique optical properties, narrow size distributions, and good biological affinity, gold nanoparticles have been widely applied in sensing analysis, catalytic, environmental monitoring, and disease therapy. The color of a gold nanoparticle solution and its maximum characteristic absorption wavelength will change with the particle size and inter-particle spacing. These properties are often used in the detection of hazardous chemicals, such as pesticide residues, heavy metals, banned additives, and biotoxins, in food. Because the gold nanoparticles-colorimetric sensing strategy is simple, quick, and sensitive, this method has extensive applications in real-time on-site monitoring and rapid testing of food quality and safety. Herein, we review the preparation methods, functional modification, photochemical properties, and applications of gold nanoparticle sensors in rapid testing. In addition, we elaborate on the colorimetric sensing mechanisms. Finally, we discuss the advantages and disadvantages of colorimetric sensors based on gold nanoparticles, and directions for future development.

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Diblíková, Linda, Alena Koukalová, Jan Kudláček, Michal Zoubek, and František Herrmann. "Properties of Functional Epoxy Coatings Modified by Carbon Nanoparticles." Solid State Phenomena 227 (January 2015): 127–30. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.127.

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Properties of commercially available epoxy coating were modified using multi-walled carbon nanoparticles (MWCNT) to obtain functional coating with improved abrasion resistance. Simultaneously, corrosion resistance of the epoxy resin could not be negatively affected by the particles addition. Composite coatings with various MWCNT content were prepared and evaluated with regard to their function by abrasion and corrosion tests. We found out that the abrasion resistance of the coatings increased with increasing amount of CNT particles in the matrix. Corrosion protection properties of pure epoxy coating as well as its adhesion were slightly improved by adding 0.5 and 1 wt% MWCNT.

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Mohamed, Mohamed, and Shiao Kuo. "Functional Polyimide/Polyhedral Oligomeric Silsesquioxane Nanocomposites." Polymers 11, no. 1 (December 25, 2018): 26. http://dx.doi.org/10.3390/polym11010026.

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The preparation of hybrid nanocomposite materials derived from polyhedral oligomeric silsesquioxane (POSS) nanoparticles and polyimide (PI) has recently attracted much attention from both academia and industry, because such materials can display low water absorption, high thermal stability, good mechanical characteristics, low dielectric constant, flame retardance, chemical resistance, thermo-redox stability, surface hydrophobicity, and excellent electrical properties. Herein, we discussed the various methods that have been used to insert POSS nanoparticles into PI matrices, through covalent chemical bonding and physical blending, as well as the influence of the POSS units on the physical properties of the PIs.

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Park, Young Shin, and Chang Whan Joo. "Impact of Nanoparticles on Structure and Functional Properties of PBTG Biofilms." Advanced Materials Research 1119 (July 2015): 80–85. http://dx.doi.org/10.4028/www.scientific.net/amr.1119.80.

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Biopolymer composites are required to enhance their mechanical properties and heat resistance for the industrial applications. Especially, the addition of nanoparticles in biopolymers can give various functionalities such as electrical, thermal and mechanical properties. In this study, the nanoparticles having functional characteristics were used to enhance heat resistance, tensile properties, and electrical conductivity of PBTG biofilms. Changes in tensile, crystalline and thermal properties of PBTG films with different additives (carbon black, sepiolite, zinc oxide, MWCNT) were investigated by the tensile tester and the instrument of XRD, DSC and TGA. As the results, Electrical conductivity of the biofilms was improved up to 10-5S/cm by adding MWCNT. And tensile modulus of PBTG biofilms with MWCNT was 1.37 times higher than the pure PBTG film. But their heat-resistance characteristics were not significantly affected by adding nanoparticles.

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Miyamoto, Yoshitaka, Yumie Koshidaka, Katsutoshi Murase, Shoichiro Kanno, Hirofumi Noguchi, Kenji Miyado, Takeshi Ikeya, et al. "Functional Evaluation of 3D Liver Models Labeled with Polysaccharide Functionalized Magnetic Nanoparticles." Materials 15, no. 21 (November 5, 2022): 7823. http://dx.doi.org/10.3390/ma15217823.

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Establishing a rapid in vitro evaluation system for drug screening is essential for the development of new drugs. To reproduce tissues/organs with functions closer to living organisms, in vitro three-dimensional (3D) culture evaluation using microfabrication technology has been reported in recent years. Culture on patterned substrates with controlled hydrophilic and hydrophobic regions (Cell-ableTM) can create 3D liver models (miniature livers) with liver-specific Disse luminal structures and functions. MRI contrast agents are widely used as safe and minimally invasive diagnostic methods. We focused on anionic polysaccharide magnetic iron oxide nanoparticles (Resovist®) and synthesized the four types of nanoparticle derivatives with different properties. Cationic nanoparticles (TMADM) can be used to label target cells in a short time and have been successfully visualized in vivo. In this study, we examined the morphology of various nanoparticles. The morphology of various nanoparticles showed relatively smooth-edged spherical shapes. As 3D liver models, we prepared primary hepatocyte–endothelial cell heterospheroids. The toxicity, CYP3A, and albumin secretory capacity were evaluated in the heterospheroids labeled with various nanoparticles. As the culture period progressed, the heterospheroids labeled with anionic and cationic nanoparticles showed lower liver function than non-labeled heterospheroids. In the future, there is a need to improve the method of creation of artificial 3D liver or to design a low-invasive MRI contrast agent to label the artificial 3D liver.

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Zhang, Guomei. "Functional gold nanoparticles for sensing applications." Nanotechnology Reviews 2, no. 3 (June 1, 2013): 269–88. http://dx.doi.org/10.1515/ntrev-2012-0088.

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AbstractNanoparticle-based technologies have played important roles in providing opportunities for the development of a new generation of sensing tools. Because of their unique optical, chemical, electrical, and catalytic properties, gold nanoparticles (AuNPs) have been extensively studied for biological and chemical detections as well as analytical applications. AuNP-based sensors are expected to change the foundations of sensing and detecting biomolecules and metal ions. The ease of surface functionalization of AuNPs allows chemists to create the desired functionalities for specific applications. In this review, we will discuss the use of surface-functionalized AuNPs for fabricating smart sensors that are capable of detecting heavy metal ions, glucose, and specific biomolecules such as protein and DNA.

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Bergs, Christian, Paul Simon, Yurii Prots, and Andrij Pich. "Ultrasmall functional ZnO2 nanoparticles: synthesis, characterization and oxygen release properties." RSC Advances 6, no. 88 (2016): 84777–86. http://dx.doi.org/10.1039/c6ra16009c.

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Ultrasmall zinc peroxide nanoparticles with diameter between 3.3 ± 0.9 and 14.4 ± 5.2 nm were synthesized via a completely new synthesis method (high-pressure impinging-jet reactor; MRT CR 5, Microfluidics®).

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De Keukeleere, Katrien, Glenn Pollefeyt, Jonas Feys, Jonathan De Roo, Hannes Rijckaert, Petra Lommens, and Isabel Van Driessche. "Chemical solution deposition of functional ceramic coatings using ink-jet printing." Pure and Applied Chemistry 87, no. 3 (March 1, 2015): 231–38. http://dx.doi.org/10.1515/pac-2014-0938.

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AbstractThis paper discusses the development of environmentally-friendly precursor inks suited for ink-jet printing of functional ceramic coatings. We synthesized superconducting materials, SrTiO3 thin films for coated conductor applications and transparent TiO2 photocatalytic coatings. Here, we discuss all aspects of ink formulation, including the stabilization of metal ions, nanoparticle inks or combination of both. This demands the investigation and determination of the inks rheological parameters. Ceramic nanoparticles are often incorporated in our inks to decrease thermal processing temperatures (e.g., TiO2 or YSZ coatings...) or enhance the properties of the functional ceramic coating (e.g., pinning centres in superconducting coatings). These ceramic nanoparticles (ZrO2, HfO2, TiO2...) are synthesized through methods based on microwave heating from aqueous and/or organic solutions. With that, we aim at developing smart and environmentally friendly processes that require lower energy input.

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Shin, Su-Mi, Hye-In Park, and A.-Young Sung. "Development of Functional Ophthalmic Materials Using Natural Materials and Gold Nanoparticles." Micromachines 13, no. 9 (September 1, 2022): 1451. http://dx.doi.org/10.3390/mi13091451.

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Ginsenoside, known as a natural substance, is a saponin component in ginseng and has various effects, such as antibacterial, antioxidant, and anti-inflammatory effects. In addition, gold nanoparticles can realize various optical and physical properties according to particle size and shape. For polymer polymerization, ginsenoside and gold nanoparticles were used as additives and copolymerized with a basic silicone hydrogel material. As gold nanoparticles, spherical and rod-shaped particles were used, and basic physical properties, such as water content, refractive index, and wettability of the prepared ophthalmic lenses, were measured. As a result of measuring the physical properties of the resulting polymer, it was found that the contact angle decreased by about 1.6% to 83.1% as the addition ratio of ginsenoside increased. In addition, as the addition ratio of metal nanoparticles increased, the refractive index was found to increase regardless of the shape of the nanoparticles. In addition, in the case of water content, the spherical shape gradually decreased according to the addition ratio, while the rod shape gradually increased according to the addition ratio. Therefore, it was found that the addition of ginsenoside, known as a saponin-based natural substance, has excellent wettability, and gold nanoparticles with different shapes have different properties. Thus, it is judged that the resulting copolymer can be utilized as a variety of highly functional ophthalmic polymer materials with high refractive index and high wettability.

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Metzger, Christoph, Solange Sanahuja, Lisa Behrends, Sven Sängerlaub, Martina Lindner, and Heiko Briesen. "Efficiently Extracted Cellulose Nanocrystals and Starch Nanoparticles and Techno-Functional Properties of Films Made Thereof." Coatings 8, no. 4 (April 14, 2018): 142. http://dx.doi.org/10.3390/coatings8040142.

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Cellulose nanocrystals (CNC) and starch nanoparticles (SNP) have remarkable physical and mechanical characteristics. These properties particularly facilitate their application as high-performance components of bio-based packaging films as alternatives to fossil-based counterparts. This study demonstrates a time-efficient and resource-saving extraction process of CNC and SNP by sulfuric acid hydrolysis and neutralization. The yields of the hydrolyzed products were 41.4% (CNC) and 32.2% (SNP) after hydrolysis times of 3 h and 120 h, respectively. The nanoparticle dispersions were wet-coated onto poly(lactic acid) (PLA) and paper substrates and were incorporated into starch films. No purification or functionalization of the nanoparticles was performed prior to their application. Techno-functional properties such as the permeability of oxygen and water vapor were determined. The oxygen permeability of 5–9 cm3 (STP) 100 µm m−2 d−1 bar−1 at 50% relative humidity and 23 °C on PLA makes the coatings suitable as oxygen barriers. The method used for the extraction of CNC and SNP contributes to the economic production of these nanomaterials. Further improvements, e.g., lower ion concentration and narrower particle size distribution, to achieve reproducible techno-functional properties are tangible.

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Sui, Tianyi, Baoyu Song, Feng Zhang, and Qingxiang Yang. "Effects of functional groups on the tribological properties of hairy silica nanoparticles as an additive to polyalphaolefin." RSC Advances 6, no. 1 (2016): 393–402. http://dx.doi.org/10.1039/c5ra22932d.

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Hairy silica nanoparticles with different kinds of functional groups were prepared and dispersed into polyalphaolefin, the effects of the functional groups on the tribological properties of the hairy silica nanoparticles were investigated.

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Rizal, Samsul, E. M. Mistar, A. A. Rahman, Abdul Khalil H.P.S., A. A. Oyekanmi, N. G. Olaiya, C. K. Abdullah, and Tata Alfatah. "Bionanocarbon Functional Material Characterisation and Enhancement Properties in Nonwoven Kenaf Fibre Nanocomposites." Polymers 13, no. 14 (July 14, 2021): 2303. http://dx.doi.org/10.3390/polym13142303.

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Bionanocarbon as a properties enhancement material in fibre reinforced nanobiocomposite was investigated for sustainable material applications. Currently, an extensive study using the micro size of biocarbon as filler or reinforcement materials has been done. However, poor fibre-matrix interface results in poor mechanical, physical, and thermal properties of the composite. Hence in this study, the nanoparticle of biocarbon was synthesised and applied as a functional material and properties enhancement in composite material. The bionanocarbon was prepared from an oil palm shell, an agriculture waste precursor, via a single-step activation technique. The nanocarbon filler loading was varied from 0, 1, 3, and 5% as nanoparticle properties enhancement in nonwoven kenaf fibre reinforcement in vinyl ester composite using resin transfer moulding technique. The functional properties were evaluated using TEM, particle size, zeta potential, and energy dispersion X-ray (EDX) elemental analysis. While the composite properties enhancement was evaluated using physical, mechanical, morphological, thermal, and wettability properties. The result indicated excellent nanofiller enhancement of fibre-matrix bonding that significantly improved the physical, mechanical, and thermal properties of the bionanocomposite. The SEM morphology study confirmed the uniform dispersion of the nanoparticle enhanced the fibre-matrix interaction. In this present work, the functional properties of bionanocarbon from oil palm shells (oil palm industrial waste) was incorporated in nanaobiocomposite, which significantly enhance its properties. The optimum enhancement of the bionanocomposite functional properties was obtained at 3% bionanocarbon loading. The improvement can be attributed to homogeneity and improved interfacial interaction between nanoparticles, kenaf fibre, and matrix.

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Razo, Shyatesa C., Anastasiya I. Elovenkova, Irina V. Safenkova, Natalia V. Drenova, Yuri A. Varitsev, Anatoly V. Zherdev, and Boris B. Dzantiev. "Comparative Study of Four Coloured Nanoparticle Labels in Lateral Flow Immunoassay." Nanomaterials 11, no. 12 (December 2, 2021): 3277. http://dx.doi.org/10.3390/nano11123277.

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The detection limit of lateral flow immunoassay (LFIA) is largely determined by the properties of the label used. We compared four nanoparticle labels differing in their chemical composition and colour: (1) gold nanoparticles (Au NPs), red; (2) Au-core/Pt-shell nanoparticles (Au@Pt NPs), black; (3) latex nanoparticles (LPs), green; and (4) magnetic nanoparticles (MPs), brown. The comparison was carried out using one target analyte—Erwinia amylovora, the causal bacterial agent of fire blight. All nanoparticles were conjugated with antibodies through methods that provide maximum functional coverage like physical adsorption (Au NPs, Au@Pt NPs) and covalent bonding (LPs, MPs). All conjugates demonstrated the same ability to bind with E. amylovora through enzyme-linked immunosorbent assay where optical properties of the nanoparticles do not determine the registered signal. However, half-maximal binding was achieved at different numbers of nanoparticles because they differ in size. All conjugates based on four nanoparticle labels were used for lateral flow assays. As a result, Au@Pt NPs provided the minimal detection limit that corresponded to 103 CFU/mL. Au NPs and LPs detected 104 CFU/mL, and MPs detected 105 CFU/mL. The results highlight that simply choosing a coloured label can significantly affect the detection limit of LFIA.

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Zhan, Feng, Lei Xiong, Fang Liu, and Chenying Li. "Grafting Hyperbranched Polymers onto TiO2 Nanoparticles via Thiol-yne Click Chemistry and Its Effect on the Mechanical, Thermal and Surface Properties of Polyurethane Coating." Materials 12, no. 17 (September 2, 2019): 2817. http://dx.doi.org/10.3390/ma12172817.

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In this study, we proposed a novel and facile method to modify the surface of TiO2 nanoparticles and investigated the influence of the surface-modified TiO2 nanoparticles as an additive in a polyurethane (PU) coating. The hyperbranched polymers (HBP) were grafted on the surface of TiO2 nanoparticles via the thiol-yne click chemistry to reduce the aggregation of nanoparticles and increase the interaction between TiO2 and polymer matrices. The grafting of HBP on the TiO2 nanoparticles surface was investigated by means of X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR) and thermogravimetry analysis (TGA). The thermal and mechanical properties of nanocomposite coatings containing various amounts of TiO2 nanoparticles were measured by dynamic mechanical thermal (DMTA) and tensile strength measurement. Moreover, the surface structure and properties of the newly prepared nanocomposite coatings were examined. The experimental results demonstrate that the incorporation of the surface-modified TiO2 nanoparticles can improve the mechanical and thermal properties of nanocomposite coatings. The results also reveal that the surface modification of TiO2 with the HBP chains improves the nanoparticle dispersion, and the coating surface shows a lotus leaf-like microstructure. Thus, the functional nanocomposite coatings exhibit superhydrophobic properties, good photocatalytic depollution performance, and high stripping resistance.

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Zhang, Weijie, Huangchen Shen, Ying Li, Kai Yang, Peng Lei, Yian Gu, Liang Sun, Hong Xu, and Rui Wang. "Preparation of Type-A Gelatin/Poly-γ-Glutamic Acid Nanoparticles for Enhancing the Stability and Bioavailability of (-)-Epigallocatechin Gallate." Foods 12, no. 9 (April 23, 2023): 1748. http://dx.doi.org/10.3390/foods12091748.

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(-)-Epigallocatechin gallate (EGCG) has gained considerable attention owing to its beneficial properties. However, its application as a functional food is restricted due to its instability and low bioavailability. In the present study, a food-derived nanoparticle system based on type A gelatin/γ-PGA was developed to preserve and deliver EGCG. The EGCG/gelatin/γ-PGA nanoparticles had a particle size of 155.1 ± 7.3 nm with a zeta potential of −23.9 ± 0.9 mV. Moreover, the EGCG/gelatin/γ-PGA nanoparticles enhanced the long-term storage stability and sustained antioxidant activity of EGCG compared to EGCG/gelatin nanoparticles. The nanoparticles protected EGCG in simulated gastric fluid containing pepsin while releasing it in simulated intestinal fluid. Additionally, the amount of EGCG transported in the Caco-2 monolayers treated with EGCG/gelatin/γ-PGA nanoparticles was three times higher than that of free EGCG, which might be related to the paracellular pathway and endocytosis. These results suggest that EGCG/gelatin/γ-PGA nanoparticles might be an effective delivery vehicle for EGCG, enhancing its potential applications in the functional food field.

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Lee, Jae Hoon, Tae Min Kim, In-Gyu Choi, and Joon Weon Choi. "Phenolic Hydroxyl Groups in the Lignin Polymer Affect the Formation of Lignin Nanoparticles." Nanomaterials 11, no. 7 (July 9, 2021): 1790. http://dx.doi.org/10.3390/nano11071790.

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Alkaline soda lignin (AL) was sequentially fractionated into six fractions of different molecular size by means of solvent extraction and their phenolic hydroxyl groups were chemoselectively methylated to determine their effect on nanoparticle formation of lignin polymers. The effect of the lignin structure on the physical properties of nanoparticles was also clarified in this study. Nanoparticles were obtained from neat alkaline soda lignin (ALNP), solvent-extracted fractions (FALNPs, i.d. 414–1214 nm), and methylated lignins (MALNPs, i.d. 516–721 nm) via the nanoprecipitation method. Specifically, the size properties of MALNPs showed a high negative correlation (R2 = 0.95) with the phenolic hydroxyl group amount. This indicates that the phenolic hydroxyl groups in lignin could be influenced on the nucleation or condensation during the nanoprecipitation process. Lignin nanoparticles exhibited high colloidal stability, and most of them also showed good in vitro cell viability. This study presents a possible way to control nanoparticle size by blocking specific functional groups and decreasing the interaction between hydroxyl groups of lignin.

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Ivanišević, Irena, Marin Kovačić, Marko Zubak, Antonia Ressler, Sara Krivačić, Zvonimir Katančić, Iva Gudan Pavlović, and Petar Kassal. "Amphiphilic Silver Nanoparticles for Inkjet-Printable Conductive Inks." Nanomaterials 12, no. 23 (November 29, 2022): 4252. http://dx.doi.org/10.3390/nano12234252.

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The large-scale manufacturing of flexible electronics is nowadays based on inkjet printing technology using specially formulated conductive inks, but achieving adequate wetting of different surfaces remains a challenge. In this work, the development of a silver nanoparticle-based functional ink for printing on flexible paper and plastic substrates is demonstrated. Amphiphilic silver nanoparticles with narrow particle size distribution and good dispersibility were prepared via a two-step wet chemical synthesis procedure. First, silver nanoparticles capped with poly(acrylic acid) were prepared, followed by an amidation reaction with 3-morpholynopropylamine (MPA) to increase their lipophilicity. Density functional theory (DFT) calculations were performed to study the interactions between the particles and the dispersion medium in detail. The amphiphilic nanoparticles were dispersed in solvents of different polarity and their physicochemical and rheological properties were determined. A stable ink containing 10 wt% amphiphilic silver nanoparticles was formulated and inkjet-printed on different surfaces, followed by intense pulsed light (IPL) sintering. Low sheet resistances of 3.85 Ω sq–1, 0.57 Ω sq–1 and 19.7 Ω sq–1 were obtained for the paper, coated poly(ethylene terephthalate) (PET) and uncoated polyimide (PI) flexible substrates, respectively. Application of the nanoparticle ink for printed electronics was demonstrated via a simple flexible LED circuit.

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Tania, Imana Shahrin, and Mohammad Ali. "Coating of ZnO Nanoparticle on Cotton Fabric to Create a Functional Textile with Enhanced Mechanical Properties." Polymers 13, no. 16 (August 13, 2021): 2701. http://dx.doi.org/10.3390/polym13162701.

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The goal of this research is to develop a functional textile with better mechanical properties. Therefore, nano ZnO is synthesized, characterized, and applied to cotton fabric by mechanical thermo-fixation techniques. The synthesized nanoparticles are characterized by SEM and XRD analysis. The ZnO nanoparticle alone, ZnO nanoparticle with a binder, and ZnO with a binder and wax emulsion are then applied on cotton woven fabrics using three different recipes. The surface morphology of the treated fabric is studied using SEM and EDS. Antimicrobial activity, UV protection property, and crease resistance are all tested for their functional characteristics. In addition, all vital mechanical characteristics are assessed. The results suggest that using only nano ZnO or nano ZnO with a binder enhances functional features while deteriorating mechanical capabilities. Nano ZnO treatment with the third recipe, which includes the addition of an emulsion, on the other hand, significantly enhances mechanical and functional characteristics. Consequently, this study provides information to optimize the confidence of textile researchers and producers in using nano ZnO and understanding its features in key functional fabrics.

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Syzrantsev, Vyacheslav, Evgenii Paukshtis, Tatyana Larina, Yuriy Chesalov, Sergey Bardakhanov, and Andrey Nomoev. "Features of Surface Structures of Alumina and Titanium Dioxide Nanoparticles Produced Using Different Synthesis Methods." Journal of Nanomaterials 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/2065687.

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A comparative study of the scope and surface properties of alumina (Al2O3) and titanium dioxide (TiO2) nanoparticles, synthesized using different methods, was carried out using Fourier-transform infrared spectroscopy (FTIR), ultraviolet UV-Vis diffuse reflection spectroscopy (UV-Vis DRS), and Raman spectroscopy, as well as X-ray diffraction methods. It is shown that the differences in the synthesis methods can change the surface properties of the nanoparticles, while maintaining the phase composition of the material. The nanoparticles of each material are shown to exhibit unexpected properties. In particular, the special luminescence characteristics of TiO2, a photon-energy shift from the rutile region into that region typical for the anatase, and a significant difference in the Lewis center concentration values for the alumina γ-phase were observed. This variation in the properties indicates the necessity to involve a wider range of analysis techniques and the importance of precisely characterizing the surface properties. To identify those nanoparticle functional properties that determine their interactions with other materials, a comprehensive study of their phase compositions and surface properties must be completed.

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Vengadaesvaran, B., N. Arun, R. Chanthiriga, A. R. Bushroa, S. Ramis Rau, K. Ramesh, G. H. E. Alshabeeb, S. Ramesh, and A. K. Arof. "Effect of Silver Nanoparticles on the Mechanical and Physical Properties of Epoxy Based Silane Coupling Agent." Journal of Nano Research 26 (December 2013): 153–58. http://dx.doi.org/10.4028/www.scientific.net/jnanor.26.153.

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In this work, silver nanoparticles were synthesized using the precipitation method at room temperature. The size of the silver nanoparticle was analyzed using transmission electron microscope and found to be in the range of 20 to 40 nm. The multi-functional transparent film on glass substrate was prepared using silver nanoparticle solutions and 3-Glycidyloxypropyltrimethoxy silane (GLYMO) by dip coating method. Ultraviolet visible spectroscopy measurement shows low absorbance thus confirming high transparency level. The critical load obtained from the micro-scratch test showed an increase from 3000 mN to 3319 mN.

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Huang, Weidong, Yuan Hou, Xinyi Lu, Ziyun Gong, Yaoyao Yang, Xiao-Ju Lu, Xian-Li Liu, and Deng-Guang Yu. "The Process–Property–Performance Relationship of Medicated Nanoparticles Prepared by Modified Coaxial Electrospraying." Pharmaceutics 11, no. 5 (May 10, 2019): 226. http://dx.doi.org/10.3390/pharmaceutics11050226.

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In pharmaceutical nanotechnology, the intentional manipulation of working processes to fabricate nanoproducts with suitable properties for achieving the desired functional performances is highly sought after. The following paper aims to detail how a modified coaxial electrospraying has been developed to create ibuprofen-loaded hydroxypropyl methylcellulose nanoparticles for improving the drug dissolution rate. During the working processes, a key parameter, i.e., the spreading angle of atomization region (θ, °), could provide a linkage among the working process, the property of generated nanoparticles and their functional performance. Compared with the applied voltage (V, kV; D = 2713 − 82V with RθV2 = 0.9623), θ could provide a better correlation with the diameter of resultant nanoparticles (D, nm; D = 1096 − 5θ with RDθ2 = 0.9905), suggesting a usefulness of accurately predicting the nanoparticle diameter. The drug released from the electrosprayed nanoparticles involved both erosion and diffusion mechanisms. A univariate quadratic equation between the time of releasing 95% of the loaded drug (t, min) and D (t = 38.7 + 0.097D − 4.838 × 105D2 with a R2 value of 0.9976) suggests that the nanoparticle diameter has a profound influence on the drug release performance. The clear process-property-performance relationship should be useful for optimizing the electrospraying process, and in turn for achieving the desired medicated nanoparticles.

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Vatta, Laura L., Ron D. Sanderson, and Klaus R. Koch. "Magnetic nanoparticles: Properties and potential applications." Pure and Applied Chemistry 78, no. 9 (January 1, 2006): 1793–801. http://dx.doi.org/10.1351/pac200678091793.

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Magnetic particles may be used to selectively attach and manipulate or transport targeted species to a desired location under the influence of an external magnetic field. By virtue of their size, magnetic nanoparticles are superparamagnetic, offering great potential in a variety of applications in their bare form or through coating with a surface coating and functional group chosen for a specific application. In this paper, and in order to illustrate this concept, three applications for the use of magnetic nanoparticles will be discussed, namely, in magnetic liquids for densimetric separation, in therapeutic and diagnostic testing, and in effluent processing and metal ion removal.

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Ali, Zeeshan, Chuanxiang Zhang, Junchen Zhu, Gang Jin, Zhifei Wang, Yanqi Wu, Muhammad Ammar Khan, Jianguo Dai, and Yongjun Tang. "The Role of Nanotechnology in Food Safety: Current Status and Future Perspective." Journal of Nanoscience and Nanotechnology 18, no. 12 (December 1, 2018): 7983–8002. http://dx.doi.org/10.1166/jnn.2018.16395.

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Nanotechnology is an emerging science in food production and processing sector, yet the role of nanotechnology in food safety has not been comprehensively reviewed. This study reviewed the types, sources and mode of actions of the nanoparticles used in the food systems. Additionally, the effect of nanoparticles on animal health and safety of the products of animal origin was evaluated. Moreover, retention of nutritionally important nanoparticle minerals in the animal systems and foods of animal origins was analyzed. Furthermore, food safety was critically evaluated in terms of antioxidative ability, antibacterial properties, and toxicological studies. Finally, the scope of nanoparticle-based functional foods and shelf-life enhancement using active packaging was discussed. The article concluded that although significant research has been done on the use of nanoparticles in food systems, yet commercialization of nanoparticle-based foods needs further investigation.

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Mennicken, Max, Sophia Katharina Peter, Corinna Kaulen, Ulrich Simon, and Silvia Karthäuser. "Impact of device design on the electronic and optoelectronic properties of integrated Ru-terpyridine complexes." Beilstein Journal of Nanotechnology 13 (February 15, 2022): 219–29. http://dx.doi.org/10.3762/bjnano.13.16.

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The performance of nanoelectronic and molecular electronic devices relies strongly on the employed functional units and their addressability, which is often a matter of appropriate interfaces and device design. Here, we compare two promising designs to build solid-state electronic devices utilizing the same functional unit. Optically addressable Ru-terpyridine complexes were incorporated in supramolecular wires or employed as ligands of gold nanoparticles and contacted by nanoelectrodes. The resulting small-area nanodevices were thoroughly electrically characterized as a function of temperature and light exposure. Differences in the resulting device conductance could be attributed to the device design and the respective transport mechanism, that is, thermally activated hopping conduction in the case of Ru-terpyridine wire devices or sequential tunneling in nanoparticle-based devices. Furthermore, the conductance switching of nanoparticle-based devices upon 530 nm irradiation was attributed to plasmon-induced metal-to-ligand charge transfer in the Ru-terpyridine complexes used as switching ligands. Finally, our results reveal a superior device performance of nanoparticle-based devices compared to molecular wire devices based on Ru-terpyridine complexes as functional units.

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Kadhum, Mohammed, Tahseen Mubarak, and Nadia Jassim. "Structural and Fluorescence Properties of TiO2/Ag Nanoparticles Bilayers." Diyala Journal For Pure Science 17, no. 3 (July 1, 2021): 55–70. http://dx.doi.org/10.24237/djps.17.03.557c.

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The optical properties of the TiO2 / Ag hybrid nanoparticles were improved as the particles were prepared with a pulsed liquid laser ablation (PLAL) technology. The effect of number of pulses (450) on the structural and optical properties of nanoparticles prepared in distilled water (DW) as growth media was examined using a Q-Switched Nd-YAG laser with wavelength (1064 nm), ablation energy (530 mJ) and repetition rate (1Hz). The distance between the target and the lens (10 cm). Several were used for the diagnosis such as X-ray diffraction analysis, fourier infrared transformations, TEM assays and fluorescence of the prepared samples. The results of X-ray diffraction analysis of the silver nanoparticles deposited on a glass slide showed that the crystal system is cubic and polycrystalline, with the direction being dominated by [111] at the level of the crystals. The results of X-ray diffraction analysis of a solution of titanium dioxide nanoparticles deposited on a glass slide revealed the presence of a quadrangular crystal system, indicating the presence of titanium dioxide particles in (rutile), and that the prevailing trend for crystalline levels is [110]. The functional groups of (TiO2 / Ag) were determined in the liquid medium by the (FTIR) technique. Also, TEM images showed the presence of nanoparticles and microparticles in an almost spherical shape. The fluorescence measurement of (TiO2 / Ag) hybrid particles showed that through the graph the peak values of (284.1) and (418.3) nm. This is roughly identical to the absorption spectrum results of a hybrid silver and titanium dioxide nanoparticle solution.

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Shevchuk, O. M., N. M. Bukartyk, Z. Ya Nadashkevych, and V. S. Tokarev. "SYNTHESIS AND PROPERTIES OF SILICA NANOPARTICLES WITH FUNCTIONAL POLYMER SHELL." Chemistry, Technology and Application of Substances 2, no. 1 (June 1, 2019): 153–58. http://dx.doi.org/10.23939/ctas2019.01.153.

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Archana, J., M. Navaneethan, T. Prakash, S. Ponnusamy, C. Muthamizhchelvan, and Y. Hayakawa. "Chemical synthesis and functional properties of magnesium doped ZnSe nanoparticles." Materials Letters 100 (June 2013): 54–57. http://dx.doi.org/10.1016/j.matlet.2013.02.086.

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Qadry, Annisa Nur, Noor Afifah Kharisma, and Subaer. "The Properties of Geopolymer-Cuo Nanoparticles as a Functional Composite." Materials Science Forum 967 (August 2019): 281–85. http://dx.doi.org/10.4028/www.scientific.net/msf.967.281.

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CuO nanoparticles (CuO-NPs) have been attracted much attention recently as a functional material. This study was conducted to investigate the properties of geopolymer-CuO-NPs as a functional composite. Geopolymer paste was produced through the alkali-activation method of metakaolin. CuO-NPs was synthesized from precipitation of CuSO4 in NaOH solution. The composites were developed by mixing geopolymer with CuO-NPs varying the concentration of CuO-NPs relative to metakaolin. The structure of the raw materials, as well as the resulting composites, was examined by using x-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The mechanical properties of the composites were measured by using compressive and flexural measurements. The measurements results showed that geopolymer CuO-NPs composites offer a wide range of potential structural applications.

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Arthi, G., J. Archana, M. Navaneethan, S. Ponnusamy, Y. Hayakawa, and C. Muthamizhchelvan. "Solvothermal growth of diethylamine capped TiO2 nanoparticles and functional properties." Journal of Materials Science: Materials in Electronics 26, no. 4 (January 31, 2015): 2380–83. http://dx.doi.org/10.1007/s10854-015-2694-z.

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Guerra, Fernanda D., McKenzie L. Campbell, Daniel C. Whitehead, and Frank Alexis. "Tunable Properties of Functional Nanoparticles for Efficient Capture of VOCs." ChemistrySelect 2, no. 31 (October 31, 2017): 9889–94. http://dx.doi.org/10.1002/slct.201701736.

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Joy, Francis, Jyothis Devasia, Aatika Nizam, Vasantha Veerappa Lakshmaiah, and Suresh Babu Naidu Krishna. "Fungi-Templated Silver Nanoparticle Composite: Synthesis, Characterization, and Its Applications." Applied Sciences 13, no. 4 (February 8, 2023): 2158. http://dx.doi.org/10.3390/app13042158.

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The self-assembly of nanoparticles on living bio-templates is a promising synthetic methodology adopted for synthesizing nano/microstructures with high efficiency. Therefore, the method of bio-templating offers various advantages in controlling the geometries of nano/microstructures, thereby increasing the efficiency of the synthesized material towards various functional applications. Herein, we utilized a filamentous fungus (Sclerotium rolfsii) as a soft bio-template to generate silver nanoparticle (AgNP) microtubules adhering to the fungal hyphae. The resulting composite combines the unique properties of silver nanoparticles with the biological activity of the fungi. The 3D fungal hyphae–silver nanoparticle (FH-AgNP) composite was characterized using SEM, elemental analysis, and the X-ray diffraction technique. Additionally, to highlight the functional application of the synthesized composite, dye degradation studies of methylene blue under visible light was effectuated, and a percentage degradation of 67.86% was obtained within 60 min, which highlights the potent catalytic activity of FH-AgNPs in dye degradation. Further, the antibacterial study of the composite was carried out against the bacterium Escherichia coli, and it was found that 200 μg of the composite exhibited maximum antibacterial properties against Gram positive (Staphylococcus aureus) and Gram negative (Escherichia coli) bacteria. Overall, fungi-templated silver nanoparticle composites are a promising area of research due to their combination of biological activity and unique physical and chemical properties.

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Ferjaoui, Zied, Raphaël Schneider, Abdelaziz Meftah, Eric Gaffet, and Halima Alem. "Functional responsive superparamagnetic core/shell nanoparticles and their drug release properties." RSC Advances 7, no. 42 (2017): 26243–49. http://dx.doi.org/10.1039/c7ra02437a.

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Folic acid functionalized responsive core/shell superparamagnetic iron oxide nanoparticles were successfully synthesized for further application in cancer therapy. Their cancer drug loading and release performances were demonstrated.

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Macieja, Szymon, Bartosz Środa, Beata Zielińska, Swarup Roy, Artur Bartkowiak, and Łukasz Łopusiewicz. "Bioactive Carboxymethyl Cellulose (CMC)-Based Films Modified with Melanin and Silver Nanoparticles (AgNPs)—The Effect of the Degree of CMC Substitution on the In Situ Synthesis of AgNPs and Films’ Functional Properties." International Journal of Molecular Sciences 23, no. 24 (December 8, 2022): 15560. http://dx.doi.org/10.3390/ijms232415560.

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Green synthesis of nanoparticles for use in food packaging or biomedical applications is attracting increasing interest. In this study, the effect of the degree of substitution (0.7, 0.9 and 1.2) of a carboxymethylcellulose polymer matrix on the synthesis and properties of silver nanoparticles using melanin as a reductant was investigated. For this purpose, the mechanical, UV–Vis barrier, crystallinity, morphology, antioxidant and antimicrobial properties of the films were determined, as well as the color and changes in chemical bonds. The degree of substitution effected noticeable changes in the color of the films (the L* parameter was 2.87 ± 0.76, 5.59 ± 1.30 and 13.45 ± 1.11 for CMC 0.7 + Ag, CMC 0.9 + Ag and CMC 1.2 + Ag samples, respectively), the UV–Vis barrier properties (the transmittance at 280 nm was 4.51 ± 0.58, 7.65 ± 0.84 and 7.98 ± 0.75 for CMC 0.7 + Ag, CMC 0.9 + Ag and CMC 1.2 + Ag, respectively) or the antimicrobial properties of the films (the higher the degree of substitution, the better the antimicrobial properties of the silver nanoparticle-modified films). The differences in the properties of films with silver nanoparticles synthesized in situ might be linked to the increasing dispersion of silver nanoparticles as the degree of CMC substitution increases. Potentially, such films could be used in food packaging or biomedical applications.

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Green, Erica, Emily Fullwood, Julieann Selden, and Ilya Zharov. "Functional membranes via nanoparticle self-assembly." Chemical Communications 51, no. 37 (2015): 7770–80. http://dx.doi.org/10.1039/c5cc01388g.

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Nanoporous and ion conductive materials can be prepared by the self-assembly of nanoparticles, providing membranes with size and charge selectivity suitable for separation and possessing proton or lithium transport properties suitable for fuel cells and batteries.

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Cohen, Sarah, Evgeni Zelikman, and Ran Yosef Suckeveriene. "Ultrasonically Induced Polymerization and Polymer Grafting in the Presence of Carbonaceous Nanoparticles." Processes 8, no. 12 (December 19, 2020): 1680. http://dx.doi.org/10.3390/pr8121680.

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Nanotechnology refers to technologies using at least one nanometric dimension. Most advances have been in the field of nanomaterials used in research and industry. The vast potential of polymeric nanocomposites for advanced materials and applications such as hybrid nanocomposites with customized electrical conductivity, anti-bacterial, anti-viral, and anti-fog properties have attracted considerable attention. The number of studies on the preparation of nanocomposites in the presence of carbon materials, i.e., carbon nanotubes (CNTs) and graphene, has intensified over the last decade with the growing interest in their outstanding synergic properties. However, the functionality of such nanocomposites depends on overcoming three key challenges: (a) the breakdown of nanoparticle agglomerates; (b) the attachment of functional materials to the nanoparticle surfaces; and (c) the fine dispersion of functional nanoparticles within the polymeric matrices. Ultrasonic polymerization and grafting in the presence of nanoparticles is an innovative solution that can meet these three challenges simultaneously. These chemical reactions are less well known and only a few research groups have dealt with them to date. This review focuses on two main pathways to the design of ultrasonically induced carbon-based nanocomposites: the covalent approach which is based on the chemical interactions between the carbon fillers and the matrix, and the non-covalent approach which is based on the physical interactions.

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Karkanis, Stefanos, Alexandros K. Nikolaidis, Elisabeth A. Koulaouzidou, and Dimitris S. Achilias. "Effect of Silica Nanoparticles Silanized by Functional/Functional or Functional/Non-Functional Silanes on the Physicochemical and Mechanical Properties of Dental Nanocomposite Resins." Applied Sciences 12, no. 1 (December 24, 2021): 159. http://dx.doi.org/10.3390/app12010159.

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Dental nanocomposite resins have been proposed as potential restorative materials that are inevitably challenged with dynamic oral conditions. This investigation focused on the contribution of miscellaneous silane blends, used as coupling agents, to the ultimate performance of dental nanocomposite dimethacrylate resins. Herein, silica nanoparticles were initially silanized with functional/functional or functional/non-fuctional silane mixtures (50/50 wt/wt). Fourier transforms infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) verified the modification of nanosilica. The organomodified nanoparticles were then inserted into Bis-GMA/TEGDMA based resins by hand spatulation process. Scanning electron microscopy (SEM) findings revealed a broad distribution of fillers in the polymer network when reactive silanes and their corresponding blends were used. Furthermore, optical profilometry results showed that the presence of functional/non-functional mixtures can produce relatively smooth composite surfaces. Polymerization shrinkage was found to be limited upon the decrease of the degree of conversion regarding all the tested silane mixtures. The functional/functional silane blend assured the highest flexural properties and the lowest solubility after the storage of the nanocomposite in water for 1 week at 37 °C. The above experimental data could contribute to the proper designing of dental nanocomposite resins which may fit the modern clinical applications.

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Journal articles on the topic 'Nanoparticles - Functional Properties'

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