Relevant bibliographies by topics / Silver-titanium nanoparticles

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Silver-titanium nanoparticles'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Silver-titanium nanoparticles.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Silver-titanium nanoparticles"

1

Maciejewska, Julia, Magdalena Oćwieja, Zbigniew Adamczyk, Elżbieta Bielańska, and Bogna Napruszewska. "Titanium dioxide/silver nanoparticle bilayers prepared in self-assembly processes." Annales Universitatis Mariae Curie-Sklodowska, sectio AA – Chemia 71, no. 1 (May 24, 2016): 29. http://dx.doi.org/10.17951/aa.2016.71.1.29.

Full text
Abstract:
<p>A new method for the preparation of TiO<sub>2</sub>/Ag bilayers via colloid <br /> self-assembly process using well-characterized titanium dioxide and silver suspensions was developed. The titanium dioxide nanoparticles, forming a supporting layer, were 46 nm in diameter, exhibiting an isoelectric point at pH 6.4. The silver nanoparticles, forming an external layer of the diameter of 50 nm were prepared via a chemical reduction method with the presence inorganic phosphate salts. The electrophoretic mobility measurements revealed that the zeta potential of silver nanoparticles was highly negative for a broad range of pH and ionic strengths. By explaining this information, the optimum condition for the silver nanoparticle immobilization on TiO<sub>2</sub> supporting layers were selected. The coverage of the first layer was adjusted by ionic strength of the suspensions and by the deposition time. Afterward, the silver nanoparticle monolayers of controlled coverage were deposited under the diffusion-controlled transport. Their coverage was determined by a direct enumeration of deposited nanoparticles from AFM images and SEM micrographs. The experimental results showed that for extended deposition times, the coverage of silver nanoparticle layers significantly increases with ionic strength. Therefore, it was proven that the formation of bilayers is mainly controlled by electrostatic interactions and that it is feasible to produce uniform TiO<sub>2</sub>/Ag materials of desired coverage and structure.</p>
APA, Harvard, Vancouver, ISO, and other styles
2

Hajdu, Péter, István Lampé, Richárd Rácz, Sándor Biri, Attila Csík, Ferenc Tóth, Melinda Szalóki, et al. "Optimized Size and Distribution of Silver Nanoparticles on the Surface of Titanium Implant Regarding Cell Viability." Applied Sciences 10, no. 20 (October 12, 2020): 7063. http://dx.doi.org/10.3390/app10207063.

Full text
Abstract:
Though the antibacterial effect is advantageous, silver and silver nanoparticles can negatively affect the viability of human tissues. This study aims to check the viability of cells on surfaces with different particle size and to find the biologically optimal configuration. We investigated the effect of modified thickness of vaporized silver and applied heat and time on the physical characteristics of silver nanoparticle covered titanium surfaces. Samples were examined by scanning electron microscopy, mass spectrometry, and drop shape analyzer. To investigate how different physical surface characteristics influence cell viability, Alamar Blue assay for dental pulp stem cells was carried out. We found that different surface characteristics can be achieved by modifying procedures when creating silver nanoparticle covered titanium. The size of the nanoparticles varied between 60 to 368 nm, and hydrophilicity varied between 63 and 105 degrees of contact angle. Investigations also demonstrated that different physical characteristics are related to a different level of viability. Surfaces covered with 60 nm particle sizes proved to be the most hydrophilic, and the viability of the cells was comparable to the viability measured on the untreated control surface. Physical and biological characteristics of silver nanoparticle covered titanium, including cell viability, have an acceptable level to be used for antibacterial effects to prevent periimplantitis around implants.
APA, Harvard, Vancouver, ISO, and other styles
3

Heilman, S., and L. G. A. Silva. "Silver and Titanium Nanoparticles Used as Coating on Polyurethane Catheters." Journal of Nano Research 47 (May 2017): 17–23. http://dx.doi.org/10.4028/www.scientific.net/jnanor.47.17.

Full text
Abstract:
Silver nanoparticles have been used in the medical area due to their remarkable antimicrobial properties. In this sense titanium dioxide nanoparticles obtained by the sol-gel method were used as coating of catheters for subsequent impregnation of silver nanoparticles with gamma irradiation and electron beam at 25 and 50 kGy. This work aimed to study the use of the silver nanoparticles and titanium dioxide as coating of polyurethane Central Venous Catheter (CVC) for antimicrobial activity. Furthermore the amounts of titanium and silver present in the coated catheters had been evaluated by Inductively Coupled Plasma – Optical Emission Spectrometry (ICP OES). Therefore the Raman spectrometry was used to identify the polymorph of titanium oxide, rutile.
APA, Harvard, Vancouver, ISO, and other styles
4

Bekeschus, Sander. "Combined Toxicity of Gas Plasma Treatment and Nanoparticles Exposure in Melanoma Cells In Vitro." Nanomaterials 11, no. 3 (March 22, 2021): 806. http://dx.doi.org/10.3390/nano11030806.

Full text
Abstract:
Despite continuous advances in therapy, cancer remains a deadly disease. Over the past years, gas plasma technology emerged as a novel tool to target tumors, especially skin. Another promising anticancer approach are nanoparticles. Since combination therapies are becoming increasingly relevant in oncology, both gas plasma treatment and nanoparticle exposure were combined. A series of nanoparticles were investigated in parallel, namely, silica, silver, iron oxide, cerium oxide, titanium oxide, and iron-doped titanium oxide. For gas plasma treatment, the atmospheric pressure argon plasma jet kINPen was utilized. Using three melanoma cell lines, the two murine non-metastatic B16F0 and metastatic B16F10 cells and the human metastatic B-Raf mutant cell line SK-MEL-28, the combined cytotoxicity of both approaches was identified. The combined cytotoxicity of gas plasma treatment and nanoparticle exposure was consistent across all three cell lines for silica, silver, iron oxide, and cerium oxide. In contrast, for titanium oxide and iron-doped titanium oxide, significantly combined cytotoxicity was only observed in B16F10 cells.
APA, Harvard, Vancouver, ISO, and other styles
5

Saadmim, Faizah, Taseen Forhad, Ahmed Sikder, William Ghann, Meser M. Ali, Viji Sitther, A. J. Saleh Ahammad, Md Abdus Subhan, and Jamal Uddin. "Enhancing the Performance of Dye Sensitized Solar Cells Using Silver Nanoparticles Modified Photoanode." Molecules 25, no. 17 (September 3, 2020): 4021. http://dx.doi.org/10.3390/molecules25174021.

Full text
Abstract:
In this study, silver nanoparticles were synthesized, characterized, and applied to a dye-sensitized solar cell (DSSC) to enhance the efficiency of solar cells. The synthesized silver nanoparticles were characterized with UV–Vis spectroscopy, dynamic light scattering, transmission electron microscopy, and field emission scanning electron microscopy. The silver nanoparticles infused titanium dioxide film was also characterized by Fourier transform infrared and Raman spectroscopy. The performance of DSSC fabricated with silver nanoparticle-modified photoanode was compared with that of a control group. The current and voltage characteristics of the devices as well as the electrochemical impedance measurements were also carried out to assess the performance of the fabricated solar cells. The solar-to-electric efficiency of silver nanoparticles based DSSC was 1.76%, which is quite remarkable compared to the 0.98% realized for DSSC fabricated without silver nanoparticles.
APA, Harvard, Vancouver, ISO, and other styles
6

Aluicio-Sarduy, Eduardo, Simone Callegari, Diana Gisell Figueroa del Valle, Andrea Desii, Ilka Kriegel, and Francesco Scotognella. "Electric field induced structural colour tuning of a silver/titanium dioxide nanoparticle one-dimensional photonic crystal." Beilstein Journal of Nanotechnology 7 (October 6, 2016): 1404–10. http://dx.doi.org/10.3762/bjnano.7.131.

Full text
Abstract:
An electric field is employed for the active tuning of the structural colour in photonic crystals, which acts as an effective external stimulus with an impact on light transmission manipulation. In this work, we demonstrate structural colour in a photonic crystal device comprised of alternating layers of silver nanoparticles and titanium dioxide nanoparticles, exhibiting spectral shifts of around 10 nm for an applied voltage of only 10 V. The accumulation of charge at the metal/dielectric interface with an applied electric field leads to an effective increase of the charges contributing to the plasma frequency in silver. This initiates a blue shift of the silver plasmon band with a simultaneous blue shift of the photonic band gap as a result of the change in the silver dielectric function (i.e. decrease of the effective refractive index). These results are the first demonstration of active colour tuning in silver/titanium dioxide nanoparticle-based photonic crystals and open the route to metal/dielectric-based photonic crystals as electro-optic switches.
APA, Harvard, Vancouver, ISO, and other styles
7

Karthikeyan, Vasudevan, Naveen Gopi Chander, Jetti Ramesh Reddy, and Balasubramanium Muthukumar. "Effects of incorporation of silver and titanium nanoparticles on feldspathic ceramic toughness." Journal of Dental Research, Dental Clinics, Dental Prospects 13, no. 2 (August 14, 2019): 98–102. http://dx.doi.org/10.15171/joddd.2019.015.

Full text
Abstract:
Background. Porcelain is brittle and in many situations it requires replacement in fractured or chipped restorations. The prospects exist in improving the strength of feldspathic porcelain to widen its applications. This study evaluated the fracture toughness of feldspathic porcelain after incorporation of silver and titanium nanoparticles at varying concentrations (0.5 wt%, 1 wt%, 1.5 wt% and 2 wt%). Methods. Test specimen dimensions were standardized to ASTM C1421–16 standards and a three-point flexure test was carried out to evaluate fracture toughness. A total of 330 samples were fabricated and broadly divided into three groups. Group I (titanium nanoparticles) and group II (silver nanoparticles) were further subdivided into 5 groups (0 wt%, 0.5 wt%, 1 wt%, 1.5 wt% and 2 wt%) for fracture toughness analysis, with each group consisting of 30 samples. Group III contained the superior concentration of both titanium and silver nanoparticles. The fracture toughness (KIC) was calculated using indentation fracture method and microstructure observations were made using scanning electron microscopy. The KIC values were compared and evaluated using one-way ANOVA. Results. Data were analyzed using one-way ANOVA and Tukey’s HSD post hoc test multiple comparisons. The mean values of group I, group II and group III were 1.949 MPa.m1/2, 2.002 MPa.m1/2 and 1.330 MPa.m1/2 , respectively. Conclusion. The results revealed that the samples reinforced with titanium and silver nanoparticles showed significant increases in fracture toughness. The blending of superior concentration of both titanium and silver nanoparticles decreased fracture resistance.
APA, Harvard, Vancouver, ISO, and other styles
8

Zhang, Yinqing, Liwen Qiang, Yuting Yuan, Wei Wu, Binbin Sun, and Lingyan Zhu. "Impacts of titanium dioxide nanoparticles on transformation of silver nanoparticles in aquatic environments." Environmental Science: Nano 5, no. 5 (2018): 1191–99. http://dx.doi.org/10.1039/c8en00044a.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Zhang, Kai, Li Yu, Zhi Xin Lu, and Gang Song. "Synthesis and Characterization of Silver Nanoparticles Coated Titanium Dioxide Nanowires." Materials Science Forum 663-665 (November 2010): 1175–78. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.1175.

Full text
Abstract:
For the sake of investigating the special optical character of heteronanostructures, we grow TiO2 nanowires following a three step synthesis method and coat silver nanoparticles on these nanowires with replacement method. Firstly, by adjusting the experiment parameters, we get the single crystalline titanium dioxide nanowires and control their length and diameter successfully. Secondly, we use the replacement method to make the silver nanoparticles coated on these nanowires. Finally, we use transmission electron microscopy and X-ray diffraction to characterize these productions and the results show that the silver nanoparticles are coated on the titanium dioxide nanowires uniformly and the components of these nanowires are only sliver and titanium dioxide. These new optical heteronanostructures are widely investigated all over the world and we sure that they can make great influences to the development of nanophotonics.
APA, Harvard, Vancouver, ISO, and other styles
10

Zulkifli, M. R., A. R. Nurhamizah, Jariah Mohd Juoi, Zaleha Mustafa, and Zurina Shamsudin. "Silver Nanoparticles in TiO2 Coatings for Potential Antimicrobial Coatings." Advanced Materials Research 1087 (February 2015): 20–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1087.20.

Full text
Abstract:
This research aims to determine the effect of silver nanoparticles concentrations as antimicrobial coatings when doped to TiO2 coatings. The TiO2 coatings were prepared by sol–gel method initiating Titanium Isopropoxide–Propanol mixture as a precursor solution. The silver nanoparticles (40 nm) were then doped to the coating after sintering at 500°C. Two concentrations of silver nanoparticles, (50 ppm and 1000 ppm), were prepared for comparison in this study. Microstructure and crystalline phase of coatings were evaluated using Scanning Electron Microscope (SEM) and Glancing Angle X-Ray Difraction (GAXRD) technique. The antibacterial test was according to McFarland standard for detecting E.Coli, S.Aerues, fungas and Methicillin-Resistant Staphylococcus Aureus (MRSA). Results show that only coatings with the concentrations of 1000 ppm of silver nanoparticle function as antimicrobial coatings.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Silver-titanium nanoparticles"

1

Liang, Irene. "Evaluation of Immobilized Titanium Dioxide-Silver-Hydroxyapatite Nanoparticles and Colloidal Silver for Water Disinfection." Thesis, The University of Arizona, 2013. http://hdl.handle.net/10150/297687.

Full text
Abstract:
Titanium dioxide nanoparticles combined with silver and hydroxyapatite (TiO₂-Ag-Hap) form a photocatalytic composite capable of oxidizing and mineralizing a wide spectrum of microbiological and chemical contaminants in water, while silver nanoparticles have long been employed for their antimicrobial properties. These materials were evaluated through an iterative series of experiments that evaluated microbial reduction, material formulation, method of application, surface-interface interactions, and reusability. The TiO₂ formulation was assessed as an antimicrobial film coated onto fabric and ceramic beads in three experimental designs: a gravity filtration column, a portable treatment capsule, and a static chamber. Colloidal floating Ag nanoparticles in solution were also assessed. Reduction of Escherichia coli, Klebsiella terrigena, MS2 bacteriophage, and Rotavirus was evaluated though standard culture-based methods. Significant microbial reduction was only observed in the static open pan design for the TiO₂-Ag-HAp materials. Colloidal silver was more effective and caused a 5 log reduction of K. terrigena, within 60 minutes, and a 5 and 4 log reduction of MS2 within 120 and 90 minutes respectively in initial trials. The anti-microbial properties of both materials were apparent, but further investigations are necessary to assess the potential of the materials for integration and development in water treatment technologies.
APA, Harvard, Vancouver, ISO, and other styles
2

Noganta, Siyasanga. "Photocatalytic degradation of organic pollutants using Ag-Fe₃O₄/SiO₂/TiO₂ nanocomposite." Thesis, University of the Western Cape, 2015. http://hdl.handle.net/11394/5208.

Full text
Abstract:
>Magister Scientiae - MSc
The global lack of clean water for human sanitation and other purposes has become an emerging dilemma for human beings. The presence of organic pollutants in wastewater produced by textile industries, leather manufacturing and chemical industries is an alarming matter for a safe environment and human health. For the last decades, conventional methods have been applied for the purification of water but due to industrialization these methods fall short. Advanced oxidation processes and their reliable application in degradation of many contaminants have been reported as a potential method to reduce and/or alleviate this problem. Lately, it has been assumed that incorporation of some metal nanoparticles such as magnetite nanoparticles as photocatalyst for Fenton reaction could improve the degradation efficiency of contaminants. Core/shell nanoparticles, are extensively studied because of their wide applications in the biomedical, drug delivery, electronics fields and water treatment. The current study is centred on the synthesis of silver-doped Fe₃O₄/SiO₂/TiO₂ photocatalyst. Magnetically separable Fe₃O₄/SiO₂/TiO₂ composite with core–shell structure were synthesized by the deposition of uniform anatase TiO₂ NPs on Fe₃O₄/SiO₂ by using titanium butoxide (TBOT) as titanium source. Then, the silver is doped on TiO₂ layer by hydrothermal method. Integration of magnetic nanoparticles was suggested to avoid the post separation difficulties associated with the powder form of the TiO₂ catalyst, increase of the surface area and adsorption properties. Lastly and most importantly magnetic nanoparticles upsurge the production of hydroxyl groups or reduced charge recombination. The a synthesized catalysts were characterized using Transmission Electron Microscopy, X-ray Diffraction; Infra-red Spectroscopy, Scanning Electron Microscope and Energy Dispersive Spectroscopy. Other characterization techniques includeVibrating Sample Magnetometry, Brunauer Emmett Teller analysis and Thermogravimetric analysis. The average size of the particles size is 72 nm. Furthermore the photocatalytic performances of the magnetic catalysts were assessed in comparison with that commercial titanium dioxide for the degradation of methylene blue using photochemical reactor under ultra violet light. The results showed that the photocatalytic activity was enhanced using Fe₃O₄/SiO₂/TiO₂ and Ag-Fe₃O₄/SiO₂/TiO₂ compared with that for Fe₃O₄, commercial titanium dioxide powder.
APA, Harvard, Vancouver, ISO, and other styles
3

Zhang, Huanjun. "Ag/TiO[subscript 2] nanocomposites : synthesis, characterizations and applications /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CBME%202009%20ZHANGH.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Stamou, Ioannis. "Impact of silver and titanium dioxide nanoparticles on the in-vessel composting of biodegradable municipal solid waste." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10051.

Full text
Abstract:
The extensive use of nanoparticles (NPs) has started receiving increased attention because of the knowledge gaps regarding their fate in the environment and the possible impact on the environment and human health. The production of silver nanoparticles (AgNPs) and titanium dioxide nanoparticles (TiO2-NPs) is increasing and it is expected that, due to their great number of applications, their concentration in waste streams will increase in the future. The presence of NPs in waste streams may affect the treatment process (e.g., composting) and, if they are not successfully removed from the waste streams, their presence in the treated waste (e.g., compost) may present an environmental risk. Composting of the biodegradable fractions of municipal solid waste (MSW) is a widely used waste management practice, mainly because it is a cost-effective treatment technology and the final product (i.e., compost) presents several benefits to the environment, particularly as a soil conditioner. The overall aim of this thesis is to assess the effect of Ag-TiO2NPs and AgNPs that may be present in the biodegradable fractions of municipal solid waste on composting and subsequent soil application of compost. For that purpose in-vessel composting of artificial municipal solid waste contaminated with commercial nanoparticles was investigated at laboratory scale, simulating a range of relevant concentration levels. Subsequently, the fate of NPs present in mature compost use as a top-layer soil conditioner was investigated using a column approach at laboratory scale. The toxicity effect of NPs present mature compost on plant growth was further investigated. The impact of NPs during composting was assessed by monitoring the temporal dynamics of organic matter (OM) using Excitation Emission Matrix (EEM) fluorescence spectroscopy. The fate of NPs following application of contaminated mature compost as a top-soil conditioner and potential release to groundwater was investigated using a column leaching experiment while the phytotoxicity of mature compost contaminated with NPs was assessed using a seed germination bioassay. Finally, to investigate further possible environmental impacts due to the application of mature compost contaminated with NPs to soils, a Life Cycle Assessment (LCA) was conducted. The impact of commercial Ag-TiO2 NPs and AgNPs on the in-vessel composting of biodegradable municipal solid waste was investigated over 21 days, using initial concentrations of 0, 5, 10, 20 and 50 mg Ag / kg of OM. Microbial activity was inhibited in the biodegradable waste reactors using 2% NaN3 to evaluate abiotic losses. Physicochemical parameters such as pH, ash content, weight loss, and the formation of humic substances (HS) were determined after 0, 4, 7, 14 and 21 days of composting and after a maturation phase. The results indicated that the presence of 2% NaN3 in biodegradable MSW inhibited effectively the microbial activity during the first week of composting. The microbial population was activated during the second week of composting but the decomposition rate was so low that did not result in the formation of humic substances (HS) following 21 days of composting when 2% NaN3 was used. Both treatments, using Ag-TiO2-NPs and AgNPs, did not show any inhibition of the decomposition process for all the tested concentrations and EEM peaks shifted towards the HS region during in-vessel composting. Higher inorganic carbon removal resulted from NP-contaminated compost with higher NP concentrations. This may indicate that the formation of humins was higher for non-contaminated compost and decreased as the NP concentration in waste increased. The shift of the peaks towards the HS region during composting for all the treatments suggested that NPs did not have an effect on humification and therefore on compost stability. The leaching properties of the NP-contaminated compost were investigated using a column leaching test. Five samples of leachate, of 50 mL each, were collected. The highest concentrations of HS were observed in the first two leaching samples. The leaching results suggested that only a low percentage of the total NPs (in weight) in compost, up to ca. 5% for Ag and up to ca. 15% for Ti, leached out from the columns, which was assumed the amount that potentially could leach to the environment. These results suggested that NPs will mainly accumulate in soils’ top layers following application of compost contaminated with NP. The phytotoxicity of NP-contaminated compost was assessed using a seed germination bioassay and the germination index was then calculated. The results indicated that the NP-contaminated compost did not present any toxic effects to cress germination. The possible environmental impacts due to the NP-contaminated compost application to soils were investigated by conducting a comparative LCA study. The LCA study indicated that the effects of NP-contaminated compost to human health and ecosystems endpoint categories increased due to the presence of NPs. The risks are associated with terrestrial ecotoxicity and human toxicity midpoint categories and are mainly attributed to the accumulation of Ag to soils.
APA, Harvard, Vancouver, ISO, and other styles
5

Kobese, Nokubonga. "Synthesis of silver doped titanium dioxide nanocomposites using tea extract from Aspalathus linearis and evaluation of their antibacterial effects." University of the Western Cape, 2018. http://hdl.handle.net/11394/6779.

Full text
Abstract:
>Magister Scientiae - MSc
Despite the wide success of antimicrobial agents against waterborne pathogens, waterborne disease continues to pose a threat to both mankind and animals. A major concern is that certain bacteria have developed resistance to antimicrobial agents, as a result of their overuse. Silver (Ag) nanoparticles are widely used for antibacterial purposes such as medical dressings. However, they are highly toxic to human cells. Hence, there is a great interest in developing next generation antibacterial nanoparticles that are as effective as Ag nanoparticles for antibacterial functions, while having less toxicity to human cells. Several methods can be used to generate these antimicrobial nanoparticles, one of which is green nanotechnology. Green nanotechnology uses natural plants such as tea to synthesise nanoparticles rather than chemicals, thus reduce human and animal harm and improve sustainability of antibacterial agents. Silver-titanium nano-composites (Ag-TiO2 NCs) were synthesised with the hydrothermal method using a tea extract from Aspalathus linearis (Rooibos, RB), and distilled water in the presence of nitrogen. The resulting structures were characterised with high resolution transmission electron microscopy (HRTEM), energy-dispersive spectroscopy (EDS) analysis X-Ray Diffraction (XRD) and Thermogravimetric Analysis (TGA). The antibacterial characteristics of these new NCs were evaluated against 3 bacteria: Bacillus cereus, Cupriavidus metallidurans, and Escherichia coli. The optimum processing conditions to produce 6-nm spherical NPs included maintaining the temperature at 90 °C, the pH at 4.35, and using RB extract at a concentration of 2 mg/mL. The size of silver NPs was reduced in acidic conditions, agglomerated in neutral conditions, and highly reduced in alkaline conditions. Increasing the pH decreased the particle size and narrowed the particle size distribution. Gram-positive B. cereus showed slight resistance or tolerance to the Ag-TiO2 nanocomposite compared to the gram-negative bacteria E. coli and C. metallidurans. The treatment concentration required for total inhibition of E. coli and C. metallidurans growth was 100 mg/mL. Supported silver nanoparticles has shown to be a suitable way to obtain highly dispersed silver over higher surface area. This approach allowed Ag-TiO2 nanocomposite to be an efficient bactericide, with less silver amount employed.
APA, Harvard, Vancouver, ISO, and other styles
6

Korshed, Peri. "The molecular mechanisms of the antimicrobial properties of laser processed nano-particles." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/the-molecular-mechanisms-of-the-antimicrobial-properties-of-laser-processed-nanoparticles(731afee1-17f3-4698-b182-b604fb48492f).html.

Full text
Abstract:
Microbial resistance to the current available antibiotics is considered a global health problem, especially for the Multi-Drug Resistant pathogens (MDR) including methicillin resistant Staphylococcus aureus. Recently nanoparticles (NPs) have been involved in variety of antimicrobial applications due to their unique properties of antibacterial effects. However, the molecular mechanisms behind their antibacterial activity are still not fully understood. In this study, we produced silver Ag NPs (average size 27 nm) and silver-Titanium Ag-TiO2 NPs (average size 47 nm) using picosecond laser ablation. Our results showed that both laser NPs had obvious size-dependent antibacterial activity. The laser Ag NPs with a size of 19 nm and Ag-TiO2 NPs with a size 20 nm presented the highest bactericidal effect. The laser generated Ag and Ag-TiO2 NPs with concentrations 20, 30, 40, and 50 Î1⁄4g/ml showed strong antibacterial effect against three bacterial strains: E. coli, P. aeruginosa, and S. aureus, and induced the generation of reactive oxygen species (ROS), lead to cell membrane interruption, lipid peroxidation, DNA damages, glutathione depletion and the eventual cell death. Both types of laser NPs at two concentrations (2.5 and 20 Î1⁄4g/ml) showed low cytotoxicity to the in vitro cultured five types of human cells originated from the lung (A549), kidney (HEK293), Liver (HepG2), skin (HDFc) and blood vessel cells (hCAECs). The antibacterial activity of the laser generated Ag and Ag-TiO2 NPs had lasted for over one year depending on the degree of air exposure and storage conditions. Frequent air exposure increased particle oxidation and reduced the antibacterial durability of the laser generated Ag NPs. The laser generated Ag NPs had lower antibacterial activity when stored in cold compared to that stored at room temperature. The antibacterial activity of laser generated Ag and Ag-TiO2 NPs were also compared with four types of commercial based-silver wound dressings (Acticoat TM, Aquacel® Ag, Contreet ®Foam, and Urgotul® SSD) against E. coli to inform future application in this area. In conclusion, laser generated Ag and Ag-TiO2 NPs have strong bactericidal effect and low toxicity to human cells which could be a type of promising antibacterial agents for future hygiene and medical applications.
APA, Harvard, Vancouver, ISO, and other styles
7

Marcone, Glauciene Paula de Souza. "Avaliação da ecotoxicidade de nanopartículas de dióxido de titânio e prata." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249642.

Full text
Abstract:
Orientador: Wilson de Figueiredo Jardim
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química
Made available in DSpace on 2018-08-19T04:25:34Z (GMT). No. of bitstreams: 1 Marcone_GlaucienePauladeSouza_D.pdf: 3873346 bytes, checksum: 7b3d84f078c155427661a732b0d8a73b (MD5) Previous issue date: 2011
Resumo: O principal objetivo deste trabalho foi estudar as interações de nanopartículas de Ag ou nanoprata (nAg ou AgNP) e nanopartículas do semicondutor TiO2 (nTiO2) com a matriz aquática, a fim de avaliar a sua toxicidade a representantes da biota aquática. Estes dois tipos de nanomateriais (NM) foram escolhidos, pois atualmente estão sendo comercializados em grande escala por apresentarem ampla aplicação industrial. Este trabalho envolveu as seguintes etapas: a) síntese de TiO2 na forma de pó e de amostras de AgNP por rotas sintéticas estabelecidas pela literatura; b) caracterização dos NM sintetizados quanto ao tamanho e a morfologia, e no caso das suspensões de AgNP foi realizada a especiação da prata a fim de nortear uma avaliação mais criteriosa sobre ecotoxicidade destas suspensões; c) avaliação da atividade bactericida das amostras de AgNP e do TiO2 sintetizados. Para isto, utilizou-se a bactéria E. coli e um sistema FIA/Condutimétrico para medir a inibição bacteriana através da produção de CO2. d) avaliação da ecotoxicidade das suspensões de AgNP e TiO2 no meio aquático. Foram utilizados os organismos aquáticos: V. fischeri (bactéria marinha), D. similis (microscrustáceo de água doce) e P. subcapitata (alga de água doce). Devido à fotoatividade do TiO2, os testes com D. similis foram adaptados, incorporando a radiação UV-A durante o teste. As amostras de AgNP foram tóxicas aos organismos aquáticos testados nas seguintes faixas de concentração: P. subcapitata (IC50 = 1-122 mg L), D. similis (CE50 = 0,5-50 mg L) e V. fischeri (CE50 = 5,2-32,2 mg L). As amostras de TiO2 se mostraram mais tóxicas para a D. similis (CE50 = 8-57 mg L) em relação ao V. fischeri (CE50 > 100 mg L). A caracterização das amostras de TiO2 e AgNP sintetizadas indicou que fatores como fotoatividade do TiO2 e a concentração de íons Ag nas suspensões de AgNP foram determinantes para a ecotoxicidade apresentada por estas amostras
Abstract: The objective of this work was to evaluate the toxicity of silver nanoparticles or nanosilver (nAg or AgNP) and TiO2 semiconductor nanoparticles to some biotic representative aquatic organisms. These two nanomaterials (NM) types were chosen because they are currently being market on a large scale due to their wide industrial application. The work was developed in accordance to the following steps: a) Synthesis of TiO2 powder and AgNP samples by current synthetic routes. b) Shape, morphology and optical characterization of TiO2 powder and AgNP synthesized samples. The Ag speciation was performed in the AgNP suspensions to improve the ecotoxicological assessment of this material; c) Bactericidal activity assessment of TiO2 and AgNP samples using E. coli. The inhibition of the bacterial growth was followed by CO2 produced using a FIA/Conductivity system; d) Ecotoxicity assessment of TiO2 and AgNP suspensions to aquatic organisms. The aquatic organisms used were V. fischeri (marine bacterium), D. similis (microcrustace freshwater) and P. subcapitata (algae freshwater). Due to the TiO2 photoactivity, the tests with D. similis were adapted by include to UV-A radiation during the whole test period. The results showed that AgNP samples were toxic to aquatic organisms in the following ranges: P. subcapitata (CI50 = 1-122 mg L), D. similis (EC50 = 0.5-50 mg L) and V. fischeri (EC50 = 5.2-32.2 mg L). The TiO2 samples were more toxic to the D. similis (EC50 = 8-57mg L) compared to V. fischeri (CE50 > 100 mg L). The characterization of TiO2 and AgNP synthesized samples indicated that factors such as TiO2 photoactivity and Ag ions concentration in AgNP suspensions were responsible to the ecotoxicity showed by this samples
Doutorado
Quimica Analitica
Doutor em Ciências
APA, Harvard, Vancouver, ISO, and other styles
8

McCracken, Christie Joy. "Toxicity of Food-Relevant Nanoparticles in Intestinal Epithelial Models." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437688702.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Müller, Nicole. "Nanoparticles in the environment risk assessment based on exposure-modelling : what concentrations of nano titanium dioxide, carbon nanotubes and nano silver are we exposed to? /." Zürich : ETH Zurich, Department of Environmental Sciences, 2007. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=347.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Hartmann, Sarah [Verfasser], and Klaudia [Gutachter] Witte. "Ecotoxicological impacts of wastewater-borne silver and titanium-dioxide nanoparticles on the behaviour, physiology and reproduction of Daphnia magna and Danio rerio larvae / Sarah Hartmann ; Gutachter: Klaudia Witte." Siegen : Universitätsbibliothek der Universität Siegen, 2019. http://d-nb.info/1206733977/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Silver-titanium nanoparticles"

1

Zucker, Robert Martin, and Kaitlin Marie Daniel. "Microscopy Imaging Methods for the Detection of Silver and Titanium Nanoparticles Within Cells." In Nanoparticles in Biology and Medicine, 483–96. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-61779-953-2_39.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Saji, Joel, Akhela Umapathi, S. R. Manohara, P. N. Navya, Mamta Kumawat, Divya Prakash, and Hemant Kumar Daima. "Polyvinyl Alcohol Scaffold Incorporated with Silver Nanoparticles and Titanium Dioxide: Electrical, Dielectric, Dye Degradation, and Antibacterial Properties." In Advances in Mechanical Engineering, 367–79. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0942-8_36.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Zucker, Robert Martin, and William K. Boyes. "Combination of Dark-Field and Confocal Microscopy for the Optical Detection of Silver and Titanium Nanoparticles in Mammalian Cells." In Methods in Molecular Biology, 395–414. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0319-2_28.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Shrivas, Kamlesh, Archana Ghosale, and Pathik Maji. "Advanced Nanomaterials for the Removal of Chemical Substances and Microbes From Contaminated and Waste Water." In Waste Management, 475–502. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1210-4.ch024.

Full text
Abstract:
The development of cost-effective, efficient and stable materials helps to provide the affordable solutions to get safe and fresh water to increasing population with health guidelines of emerging contaminants. Nanomaterials (NMs)-based techniques involve the design, synthesis, manipulation, characterization and exploitation of materials for adsorption and separation of target species from the contaminated and waste water. NMs show better adsorption capacity and catalytic for number chemical species and microbes because of their small size and large surface area that favors the purification and treatment of waste or contaminated environmental water. Here, we present the chemical properties, adsorption/removal mechanism and applications of advanced NMs such as magnetic nanoparticles (MNPs), carbon nanotubes (CNTs), graphene and graphene oxide (GO), titanium oxide (TiO2), silica (SiO2), silver (Ag), gold (Au) NPs and zeolites in effective and efficient removal of toxic metal ions, organic and inorganic chemical substances and disease-causing microbes from contaminated and wastewater.
APA, Harvard, Vancouver, ISO, and other styles
5

Wahyuni, Endang Tri, and Roto Roto. "Silver Nanoparticle Incorporated Titanium Oxide for Bacterial Inactivation and Dye Degradation." In Titanium Dioxide - Material for a Sustainable Environment. InTech, 2018. http://dx.doi.org/10.5772/intechopen.75918.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Silver-titanium nanoparticles"

1

Nyga, P., S. Chmiel, M. Szczurek, M. Liszewska, M. Stefaniak, J. Firak, M. Michalska-Domanska, J. Mierczyk, and M. Norek. "Silver nanoparticles in titanium dioxide host plasmonic absorbers." In 2016 18th International Conference on Transparent Optical Networks (ICTON). IEEE, 2016. http://dx.doi.org/10.1109/icton.2016.7550459.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Apoorva, G., K. Lavanya, Vidisha, Pavani, R. Rohith Kumar, Q. Hasan, and D. Ramakrishna. "Genotoxic effects of silver and Titanium dioxide nanoparticles." In 2013 International Conference on Advanced Nanomaterials and Emerging Engineering Technologies (ICANMEET). IEEE, 2013. http://dx.doi.org/10.1109/icanmeet.2013.6609258.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Maharubin, Shahrima, Xiaomei Shu, Manavi Singh, Benildo De los Reyes, and George Tan. "Surface Modifications of Titanium With Covalently-Bonded Silver Nanoparticles for Antimicrobial Applications." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2870.

Full text
Abstract:
Abstract Formation of biofilm on implant surface is one of the major causes for port-operative infection. Incorporation of antimicrobial silver nanoparticles (AgNPs) on implant surface has been studied as an effective remedy in recent decades. This paper presents a novel AgNPs-titanium composite foil manufactured through covalent attachment of AgNPs for biofilm control. This composite foil was fabricated by a series of chemical reactions including thiol-derivatization and formation of Ag-S covalent bonds. The film structure and properties were characterized through scanning electron microscopy (SEM), Energy dispersive X-ray Spectroscopy (EDS) and surface profiling. The antimicrobial performance was examined against gram positive bacterial strain Staphylococcus aureus. Results indicate that the prepared composite foil effectively reduced bacterial attachment in short term exposure and possess high stability against the release of nanoparticles. This novel antimicrobial composite material has a great potential to be used in the future biomedical instrumentation.
APA, Harvard, Vancouver, ISO, and other styles
4

Sardana, Sanjay K., Piyush K. Parashar, P. S. Chandrashekar, Sanjay K. Srivastava, and Vamsi K. Komarala. "Growth of silver nanoparticles on titanium dioxides layer for plasmonic-based solid-state solar cells." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113465.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

"Toxicity of Silver, Zinc Oxide, and Titanium Dioxide Nanoparticles to Red River Crayfish Procambarus clarkii in Mesocosm Studies." In 2014 ASABE Annual International Meeting. American Society of Agricultural and Biological Engineers, 2014. http://dx.doi.org/10.13031/aim.20141912802.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Mihut, Dorina. "Research on Antibacterial Effects of Silver, Copper and Titanium Nanoparticles Deposited using DC High Vacuum Magnetron Sputtering on Filtering Materials." In 60th Society of Vacuum Coaters Annual Technical Conference. Society of Vacuum Coaters, 2018. http://dx.doi.org/10.14332/svc17.proc.42924.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Kareem, Payman, and Essra Alsammak. "The Effect of silver and titanium dioxide nanoparticles on Klebsiella pneumoniae isolates multi resistant to antibiotics and observed by Scanning electron microscopy." In 4th International Scientific Conference of Cihan University-Erbil on Biological Sciences. Cihan University-Erbil, 2017. http://dx.doi.org/10.24086/bios17.26.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Komirisetty, Archana, Frances Williams, Aswini Pradhan, and Meric Arslan. "Integrating Sensors With Nanostructures for Biomedical Applications." In ASME 2013 2nd Global Congress on NanoEngineering for Medicine and Biology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/nemb2013-93121.

Full text
Abstract:
This paper presents the fabrication of sensors that are integrated with nanostructures and bio-functionalized to create novel devices for biomedical applications. Biosensors are in great demand for various applications including for the agriculture and food industries, environmental monitoring, and medical diagnostics. Much research is being focused on the use of nanostructures (nanowires, nanotubes, nanoparticles, etc.) to provide for miniaturization and improved performance of these devices. The use of nanostructures is favorable for such applications since their sizes are closer to that of biological and chemical species and therefore, improve the signal generated. Moreover, their high surface-to-volume ratio results in devices with very high sensitivity. The use of nanotechnology leads to smaller, lower-power smart devices. Thus, this paper presents the integration of sensors with nanostructures for biomedical applications, specifically, glucose sensing. In the work presented, a glucose biosensor and its fabrication process flow are described. The device is based on electrochemical sensing using a working electrode with bio-functionalized zinc oxide (ZnO) nano-rods. Among all metal oxide nanostructures, ZnO nano-materials play a significant role as a sensing element in biosensors due to their properties such as high isoelectric point (IEP), fast electron transfer, non-toxicity, biocompatibility, and chemical stability which are very crucial parameters to achieve high sensitivity. Amperometric enzyme electrodes based on glucose oxidase (GOx) are used due to their stability and high selectivity to glucose. The device also consists of silicon dioxide and titanium layers as well as platinum working and counter electrodes and a silver/silver chloride reference electrode. The chlorination process on the reference electrode was optimized for various times using field emission scanning electron microscope (FESEM) and energy-dispersive X-ray spectroscopy (EDS or EDX) measurements. The ZnO nanorods were grown using the hydrothermal method and will be bio-functionalized with GOx for electrochemical sensing. Once completed, the sensors will be tested to characterize their performance, including their sensitivity and stability.
APA, Harvard, Vancouver, ISO, and other styles
9

Chaleawlert-umpon, S., K. Sitthisuwannakul, P. Khemthong, P. Khamdahsag, N. Grisdanurak, C. Rungnim, S. Namuangruk, and N. Pimpha. "Co-benefit of silver nanoparticle and titanium dioxide for elemental mercury adsorption." In 2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2016. http://dx.doi.org/10.1109/nano.2016.7751373.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Azouri, Assaf, Ming Ge, Kun Xun, Klaus Sattler, Joe Lichwa, and Chittaranjan Ray. "Zeta Potential Studies of Titanium Dioxide and Silver Nanoparticle Composites in Water-Based Colloidal Suspension." In ASME 2006 Multifunctional Nanocomposites International Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/mn2006-17072.

Full text
Abstract:
We determine the zeta potential (ZP) by using electrophoretic laser light scattering and Laser Doppler Velocimetry (LDV). Particle sizes are measured by photon correlation spectroscopy (PCS). We studied the ZP for colloidal suspensions of TiO2 and Ag metal particles in order to determine the kinetic interaction and charge exchange between the particles. We investigated the natural tendency of the particles for aggregation and varied the pH of the solution. It was found that the ZP versus pH curve for the mixed TiO2/Ag did not behave as the average of the individual TiO2 and Ag curves as one would expect, and instead there was a slight horizontal shift towards higher pH values which implies that the particles in the mixed TiO2/Ag colloid are interacting with the result of charge exchange. The average particle size was measured in terms of effective diameter, for the TiO2, Ag and the mixed TiO2/Ag particles. The results indicated an increase of approximately 100 nm in the effective diameter of the mixed TiO2/Ag particles size compared to the size of the individual TiO2 particles. This can be explained as the fact that 50 nm Ag particles are adsorbed on the surface of the TiO2 particles.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Silver-titanium nanoparticles' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography