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Artículos de revistas sobre el tema "Functional nanoparticles"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 7 de febrero de 2022

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1

Cruz-Acuña, Melissa, Justin R. Halman, Kirill A. Afonin, Jon Dobson y Carlos Rinaldi. "Magnetic nanoparticles loaded with functional RNA nanoparticles". Nanoscale 10, n.º 37 (2018): 17761–70. http://dx.doi.org/10.1039/c8nr04254c.

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RNA nanoparticle constructs complexed with polyethylenimine-coated iron oxide nanoparticles are protected from enzymatic degradation and knockdown is amplified by magnetic stimulus in mammalian cells.

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2

Catala, Laure, Florence Volatron, Daniela Brinzei y Talal Mallah. "Functional Coordination Nanoparticles". Inorganic Chemistry 48, n.º 8 (20 de abril de 2009): 3360–70. http://dx.doi.org/10.1021/ic8012574.

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3

Bai, Ying, Chia-Chih Chang, Umesh Choudhary, Irem Bolukbasi, Alfred J. Crosby y Todd Emrick. "Functional droplets that recognize, collect, and transport debris on surfaces". Science Advances 2, n.º 10 (octubre de 2016): e1601462. http://dx.doi.org/10.1126/sciadv.1601462.

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We describe polymer-stabilized droplets capable of recognizing and picking up nanoparticles from substrates in experiments designed for transporting hydroxyapatite nanoparticles that represent the principal elemental composition of bone. Our experiments, which are inspired by cells that carry out materials transport in vivo, used oil-in-water droplets that traverse a nanoparticle-coated substrate driven by an imposed fluid flow. Nanoparticle capture is realized by interaction of the particles with chemical functionality embedded within the polymeric stabilizing layer on the droplets. Nanoparticle uptake efficiency is controlled by solution conditions and the extent of functionality available for contact with the nanoparticles. Moreover, in an elementary demonstration of nanoparticle transportation, particles retrieved initially from the substrate were later deposited “downstream,” illustrating a pickup and drop-off technique that represents a first step toward mimicking point-to-point transportation events conducted in living systems.

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4

Xia, Dong, Peng Huang, Heng Li y Noelia Rubio Carrero. "Fast and efficient electrical–thermal responses of functional nanoparticle decorated nanocarbon aerogels". Chemical Communications 56, n.º 92 (2020): 14393–96. http://dx.doi.org/10.1039/d0cc03784b.

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5

Jain, N. K. "Functional polymeric nanoparticles in nanomedicine". Nanomedicine: Nanotechnology, Biology and Medicine 2, n.º 4 (diciembre de 2006): 311–12. http://dx.doi.org/10.1016/j.nano.2006.10.133.

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6

Myakonkaya, Olesya, Zhiyong Hu, Muhammad Faizan Nazar y Julian Eastoe. "Recycling Functional Colloids and Nanoparticles". Chemistry – A European Journal 16, n.º 39 (8 de septiembre de 2010): 11784–90. http://dx.doi.org/10.1002/chem.201000942.

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7

Thanh, Nguyễn Thi Kim. "Functional nanoparticles for biomedical applications". Nanoscale 5, n.º 23 (2013): 11338. http://dx.doi.org/10.1039/c3nr90095a.

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8

Xie, M. X., L. Jiang, Z. P. Xu y D. Y. Chen. "Monofunctional polymer nanoparticles prepared through intramolecularly cross-linking the polymer chains sparsely grafted on the surface of sacrificial silica spheres". Chemical Communications 51, n.º 10 (2015): 1842–45. http://dx.doi.org/10.1039/c4cc07885c.

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9

Zhang, Ping, Gedeng Ruan, Amy T. Kan y Mason B. Tomson. "Functional scale inhibitor nanoparticle capsule delivery vehicles for oilfield mineral scale control". RSC Advances 6, n.º 49 (2016): 43016–27. http://dx.doi.org/10.1039/c6ra05427g.

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This study synthesized phosphonate–polymer nanoparticle capsules using SiO₂ nanoparticles as the building blocks and polymer aggregates as the template for the purpose of oilfield mineral scale control.

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10

Zaichenko, Alexander, Natalya Mitina, Oleh Shevchuk, Katerina Rayevska, Volodymyr Lobaz, Taras Skorokhoda y Rostyslav Stoika. "Development of novel linear, block, and branched oligoelectrolytes and functionally targeting nanoparticles". Pure and Applied Chemistry 80, n.º 11 (1 de enero de 2008): 2309–26. http://dx.doi.org/10.1351/pac200880112309.

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The objective of the present study is development of novel surface-active block, comb-like, and branched copolymers with peroxide-containing chains, as well as derived functional luminescent and magnetic nanoparticles. The main experimental approaches are based on tailored synthesis of the oligoperoxide surfactants of desired structures and derived coordinating complexes of transitional and rare earth elements. Oligoperoxide-based synthesis of luminescent, magnetic, and other functional nanocomposites with controlled size distribution, functionality, reactivity, and biocompatibility is described. Developed methods provide combining the formation of polymeric, metal, and metal-oxide nanoparticles with irreversible modification of their surface by functional fragments capable of radical and other reactions, including binding of physiologically active substances. Novel nanoparticles were studied by chemical, colloidal-chemical, and rheological methods, X-ray diffraction technique, luminescent spectroscopy, and transmission and scanning electronic microscopy. The availability of ditertiary peroxide fragments on the nanoparticle surface provides a possibility of radical grafting functional polymer chains. The developed functional nanoparticles have been used for phagocytosis measurement, as well as markers of pathological cells, antimicrobial remedies, and nanocarriers for targeted drug delivery.

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11

Yang, Zhang-You, Sheng-Lin Luo, Hong Li, Shi-Wu Dong, Jian He, Hong Jiang, Rong Li y Xiao-Chao Yang. "Alendronate as a robust anchor for ceria nanoparticle surface coating: facile binding and improved biological properties". RSC Adv. 4, n.º 104 (2014): 59965–69. http://dx.doi.org/10.1039/c4ra12007h.

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12

Лунин, Л. С., М. Л. Лунина, А. А. Кравцов, И. А. Сысоев, А. В. Блинов y А. С. Пащенко. "Влияние концентрации наночастиц серебра в функциональных покрытиях TiO-=SUB=-2-=/SUB=--Ag на характеристики фотопреобразователей GaInP/GaAs/Ge". Физика и техника полупроводников 52, n.º 8 (2018): 860. http://dx.doi.org/10.21883/ftp.2018.08.46210.8698.

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AbstractThe results of studying the effect of the silver nanoparticle concentration in TiO_2–Ag functional coatings on the characteristics of GaInP/GaAs/Ge photoconverters are discussed. The optimum concentration of silver nanoparticles in TiO_2 coatings, improving the functional characteristics of solar cells is determined.

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13

MATROOD, Methaq Talib y Aqeel Adil HASAN. "DENSITY FUNCTIONAL THEORY INVESTIGATION FOR INSB NANOCRYSTAL DIAMANTANE DRUG CARRIER". MINAR International Journal of Applied Sciences and Technology 03, n.º 02 (1 de junio de 2021): 18–27. http://dx.doi.org/10.47832/2717-8234.2-3.3.

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Nanomedicine remains the medicinalrequest of nanotechnology. Nanodrugvarietiesafter the medicinalrequests of nanoparticles, to nanoelectronic biosensors, thenuniform possible future applications of particle nanotechnology.Nanoparticle of medicationtransporters are optimized aimed atpreoccupation of medicationsfinishedbreathtreatment. Demonstrating and imitation of nanocrystal limits of the theophylline (C7H8N4O2)byindium – antimony (In7Sb7H20 (in diamantane constructionhave been performed by Gaussian 09 program. DFT hasremainedused for InSb nanoparticle, theophyllinemedication. Optimization and frequency on the ground national level,PBEPBE, 3-21G basis sets consumesremainedexamined. The custodiesaimed ataltogetherremainequivalenttoward zero custodies. The geometry optimization by means of both methods (PBE) for InSb diamantane nanoparticles and theophyllinedrug has been originate cutting-edgedecent agreement by experimental dataMolecular detour theory has been used to discovery highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies. Total energy, ionization potential and electron empathy have beenintendedaimed atInSbnanostructure bytheophyllinemedication.

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14

Zhang, Xu, Hongping Xiang, Mingliang Zhang y Gang Lu. "Plasmonic resonances of nanoparticles from large-scale quantum mechanical simulations". International Journal of Modern Physics B 31, n.º 24 (30 de septiembre de 2017): 1740003. http://dx.doi.org/10.1142/s0217979217400033.

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Plasmonic resonance of metallic nanoparticles results from coherent motion of its conduction electrons, driven by incident light. For the nanoparticles less than 10 nm in diameter, localized surface plasmonic resonances become sensitive to the quantum nature of the conduction electrons. Unfortunately, quantum mechanical simulations based on time-dependent Kohn–Sham density functional theory are computationally too expensive to tackle metal particles larger than 2 nm. Herein, we introduce the recently developed time-dependent orbital-free density functional theory (TD-OFDFT) approach which enables large-scale quantum mechanical simulations of plasmonic responses of metallic nanostructures. Using TD-OFDFT, we have performed quantum mechanical simulations to understand size-dependent plasmonic response of Na nanoparticles and plasmonic responses in Na nanoparticle dimers and trimers. An outlook of future development of the TD-OFDFT method is also presented.

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15

Ribeiro, Tânia, Carlos Baleizão y José Farinha. "Functional Films from Silica/Polymer Nanoparticles". Materials 7, n.º 5 (15 de mayo de 2014): 3881–900. http://dx.doi.org/10.3390/ma7053881.

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16

Chatterjee, Dev Kumar y Yong Zhang. "Multi-functional nanoparticles for cancer therapy". Science and Technology of Advanced Materials 8, n.º 1-2 (enero de 2007): 131–33. http://dx.doi.org/10.1016/j.stam.2006.09.008.

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17

Zhang, Guomei. "Functional gold nanoparticles for sensing applications". Nanotechnology Reviews 2, n.º 3 (1 de junio de 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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18

Williams, Richard A. "Manufacture and structure of functional nanoparticles". Particuology 7, n.º 2 (abril de 2009): v. http://dx.doi.org/10.1016/s1674-2001(09)00033-9.

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19

ITO, Akira y Masamichi KAMIHIRA. "Tissue Engineering Using Functional Magnetite Nanoparticles". KAGAKU TO SEIBUTSU 53, n.º 2 (2015): 82–88. http://dx.doi.org/10.1271/kagakutoseibutsu.53.82.

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20

Zhu, Huangtianzhi, Liqing Shangguan y Feihe Huang. "Multi-functional Pillararene-Stabilized Gold Nanoparticles". Matter 1, n.º 4 (octubre de 2019): 788–89. http://dx.doi.org/10.1016/j.matt.2019.08.021.

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21

Khiterer, Mariya y Kenneth J. Shea. "Spherical, Monodisperse, Functional Bridged Polysilsesquioxane Nanoparticles". Nano Letters 7, n.º 9 (septiembre de 2007): 2684–87. http://dx.doi.org/10.1021/nl071087q.

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22

Ichiyanagi, Yuko, Shinji Moritake, Shu Taira y Mitsutoshi Setou. "Functional magnetic nanoparticles for medical application". Journal of Magnetism and Magnetic Materials 310, n.º 2 (marzo de 2007): 2877–79. http://dx.doi.org/10.1016/j.jmmm.2006.11.083.

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23

Mao, Xinpei, Jiadi Xu y Honggang Cui. "Functional nanoparticles for magnetic resonance imaging". Wiley Interdisciplinary Reviews: Nanomedicine and Nanobiotechnology 8, n.º 6 (4 de abril de 2016): 814–41. http://dx.doi.org/10.1002/wnan.1400.

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24

Kosif, Irem, Chia Chih Chang, Ying Bai, Alexander E. Ribbe, Anna C. Balazs y Todd Emrick. "Picking up Nanoparticles with Functional Droplets". Advanced Materials Interfaces 1, n.º 5 (7 de mayo de 2014): 1400121. http://dx.doi.org/10.1002/admi.201400121.

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25

Popov, Konstantin I., Rikkert J. Nap, Igal Szleifer y Monica Olvera de la Cruz. "Interacting nanoparticles with functional surface groups". Journal of Polymer Science Part B: Polymer Physics 50, n.º 12 (9 de abril de 2012): 852–62. http://dx.doi.org/10.1002/polb.23077.

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26

Fu, Shaozhi, Jiyi Xia y Jingbo Wu. "Functional Chitosan Nanoparticles in Cancer Treatment". Journal of Biomedical Nanotechnology 12, n.º 8 (1 de agosto de 2016): 1585–603. http://dx.doi.org/10.1166/jbn.2016.2228.

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27

Liu, Liming y Huan Qin. "Photoacoustic molecular imaging with functional nanoparticles". Journal of Innovative Optical Health Sciences 10, n.º 04 (16 de mayo de 2017): 1730004. http://dx.doi.org/10.1142/s179354581730004x.

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Photoacoustic imaging (PAI) breaks through the optical diffusion limit by making use of the PA effect. By converting incident photons into ultrasonic waves, PAI combines high contrast of optical imaging and high spatial resolution in depth tissue of ultrasound imaging in a single imaging modality. This imaging modality has now shown potential for molecular imaging, which enables visualization of biological processes with systemically introduced functional nanoparticles. In the current review, the potentials of different optical nanoprobes as PAI contrast agents were elucidated and discussed.

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28

Wang, Zhantong, Haiyan Gao, Yang Zhang, Gang Liu, Gang Niu y Xiaoyuan Chen. "Functional ferritin nanoparticles for biomedical applications". Frontiers of Chemical Science and Engineering 11, n.º 4 (15 de febrero de 2017): 633–46. http://dx.doi.org/10.1007/s11705-017-1620-8.

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29

Rui, Lei-Lei, Hong-Liang Cao, Yu-Dong Xue, Li-Chao Liu, Lei Xu, Yun Gao y Wei-An Zhang. "Functional organic nanoparticles for photodynamic therapy". Chinese Chemical Letters 27, n.º 8 (agosto de 2016): 1412–20. http://dx.doi.org/10.1016/j.cclet.2016.07.011.

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30

Barbosa, Ana, Sofia Costa Lima y Salette Reis. "Application of pH-Responsive Fucoidan/Chitosan Nanoparticles to Improve Oral Quercetin Delivery". Molecules 24, n.º 2 (18 de enero de 2019): 346. http://dx.doi.org/10.3390/molecules24020346.

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Polymeric nanoparticles based on fucoidan and chitosan were developed to deliver quercetin as a novel functional food. Through the polyelectrolyte self-assembly method, fucoidan/chitosan (F/C) nanoparticles were obtained with three different weight ratios (1/1, 3/1, and 5/1). The content of quercetin in the fucoidan/chitosan nanoparticles was in the range 110 ± 3 to 335 ± 4 mg·mL−1, with the increase of weight ratio of fucoidan to chitosan in the nanoparticle. Physicochemically stable nanoparticles were obtained with a particle size within the 300–400 nm range and surface potential higher than +30 mV for the 1F/1C ratio nanoparticle and around −30 mV for the 3F/1C and 5F/1C ratios nanoparticles. The 1F/1C ratio nanoparticle became larger and more unstable as the pH increased from 2.5 to 7.4, while the 3F/1C and 5F/1C nanoparticles retained their initial characteristics. This result indicates that the latter nanoparticles were stable along the gastrointestinal tract. The quercetin-loaded fucoidan/chitosan nanoparticles showed strong antioxidant activity and controlled release under simulated gastrointestinal environments (in particular for the 3F/1C and 5F/1C ratios), preventing quercetin degradation and increasing its oral bioavailability.

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31

Petithory, Tatiana, Laurent Pieuchot, Ludovic Josien, Arnaud Ponche, Karine Anselme y Laurent Vonna. "Size-Dependent Internalization Efficiency of Macrophages from Adsorbed Nanoparticle-Based Monolayers". Nanomaterials 11, n.º 8 (30 de julio de 2021): 1963. http://dx.doi.org/10.3390/nano11081963.

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Functional coatings based on the assembly of submicrometric or nanoparticles are found in many applications in the biomedical field. However, these nanoparticle-based coatings are particularly fragile since they could be exposed to cells that are able to internalize nanoparticles. Here, we studied the efficiency of RAW 264.7 murine macrophages to internalize physisorbed silica nanoparticles as a function of time and particle size. This cell internalization efficiency was evaluated from the damages induced by the cells in the nanoparticle-based monolayer on the basis of scanning electron microscopy and confocal laser scanning microscopy observations. The internalization efficiency in terms of the percentage of nanoparticles cleared from the substrate is characterized by two size-dependent regimes. Additionally, we highlighted that a delay before internalization occurs, which increases with decreasing adsorbed nanoparticle size. This internalization is characterized by a minimal threshold that corresponds to 35 nm nanoparticles that are not internalized during the 12-h incubation considered in this work.

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32

Thareja, Raj K., A. Mohanta, D. Yadav y A. Kushwaha. "Synthesis and Characterization of Nanoparticles and Nanocrystalline Functional Films". Materials Science Forum 636-637 (enero de 2010): 709–13. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.709.

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This work reports on spectroscopic investigations of interaction of an expanding laser ablated plume of aluminum, zinc, graphite with ambient atmosphere of oxygen and nitrogen gas and the formation of nitrides and oxides. The ambient pressure and fluence dependence on the reactive process occurring in the ablated plume responsible for formation of oxides and nitrides is discussed. Fast photography/imaging technique using intensified charge coupled device (ICCD) is gaining importance as a diagnostic tool for understanding the dynamics of the expanding plasma plume and the gas phase nanoparticle synthesis, thus providing a novel way to understand the transportation of nanoparticles and of control of particle size. Two dimensional images of the expanding plasma plume were captured using ICCD to understand the role of vapor and shock temperature. A comprehensive study done on oxide and nitrides films using pulsed laser deposition technique for possible laser oscillations in UV region of electromagnetic spectrum is presented.

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33

Bansal, Akshaya, Muthu Kumara Gnanasammandhan y Yong Zhang. "Multi-Functional Fluorescent Upconversion Nanocrystals for Simultaneous Imaging and Delivery of Peptide Toxins". Key Engineering Materials 605 (abril de 2014): 364–67. http://dx.doi.org/10.4028/www.scientific.net/kem.605.364.

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The major hurdles faced by therapeutic biomolecules to reach clinical use are non-specificity, unnecessary side effects, sensitivity to environmental factors and poor cellular uptake. Several nanoparticle systems have been developed to overcome these issues but there are still some bottlenecks such as nanoparticle toxicity, bioavailability and inability to track the biomolecules post-delivery. Here we report the use of multi-functional lanthanide-based fluorescent upconversion nanoparticles as a safe delivery vector for peptides as well as for fluorescent tracking of delivery or for in-vitro/in-vivo imaging. The UCNs are excited by a NIR light source and emit in the Visible region. Since NIR light is used for excitation, the nanoparticles could be used for deep tissue imaging. Highly monodisperse uniformly sized, sub-100 nm, biocompatible upconversion nanoparticles were synthesized with a mesoporous silica coating. Amanitin, a peptide toxin was used as a model peptide and was loaded onto the mesoporous silica coated UCNs. The peptide loaded UCNs were delivered to B16F0 melanoma cells and significant cell death was achieved within 24 hours. The unloaded UCNs however had negligible toxicity. The UCNs were also used for imaging the cells with very good signal-to-noise ratio and almost nil background autofluorescence. The fluorescence from the UCNs was non-blinking, highly stable and could be used for long-term tracking.

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34

Mochizuki, Chihiro, Junna Nakamura y Michihiro Nakamura. "Development of Non-Porous Silica Nanoparticles towards Cancer Photo-Theranostics". Biomedicines 9, n.º 1 (13 de enero de 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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35

Huang, Weidong, Yuan Hou, Xinyi Lu, Ziyun Gong, Yaoyao Yang, Xiao-Ju Lu, Xian-Li Liu y Deng-Guang Yu. "The Process–Property–Performance Relationship of Medicated Nanoparticles Prepared by Modified Coaxial Electrospraying". Pharmaceutics 11, n.º 5 (10 de mayo de 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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36

De Keukeleere, Katrien, Glenn Pollefeyt, Jonas Feys, Jonathan De Roo, Hannes Rijckaert, Petra Lommens y Isabel Van Driessche. "Chemical solution deposition of functional ceramic coatings using ink-jet printing". Pure and Applied Chemistry 87, n.º 3 (1 de marzo de 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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37

Minh, Nguyen Viet, Vu Ngoc Tuoc y Le Thi Hong Lien. "Density Functional Based Tight Binding Study on Wurtzite ZnO Prismatic Nanoparticles". Communications in Physics 21, n.º 3 (19 de septiembre de 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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38

Ignjatovic, Nenad, Smilja Markovic, Dragana Jugovic y Dragan Uskokovic. "Molecular designing of nanoparticles and functional materials". Journal of the Serbian Chemical Society 82, n.º 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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39

Fu, Bao Song, Hu Liu y Guo Min Xiao. "Ultrafine Pd Nanoparticles Synthesis and Catalytic Performance in Methane Partial Oxidation". Advanced Materials Research 284-286 (julio de 2011): 1905–8. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1905.

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Narrow size distribution Palladium nanoparticles was synthesized by adding Pd precursor into a modified PMHS polymer solution, and then jelled by aluminium. The multi-functional polymer was characterized by NMR; Pd nanoparticle samples were characterized by TEM and catalytic activity was tested in methane partial oxidation reaction.

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40

& MAHMOOD, HAMID. "THE SYNERGISTIC EFFECT OF GOLD NANOPARTICLE LOADED WITH CEFTAZIDIUM ANTIBIOTIC AGAINST MULTIDRUG ERSISTANCE PSEUDOMONAS AERUGINOSA". IRAQI JOURNAL OF AGRICULTURAL SCIENCES 52, n.º 4 (22 de agosto de 2021): 828–35. http://dx.doi.org/10.36103/ijas.v52i4.1391.

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This study was aimed to evaluate the antimicrobial activity of gold nanoparticles that was synthesized by biological method using Aloe Vera extract. The Surface morphology of the synthesized gold nanoparticles was confirmed by Atomic force microscope (AFM) while the nature of functional groups present in gold nanoparticles was determined by FT-IR analysis. The antibacterial activity of gold nanoparticle was tested against multidrug resistance (MDR)pseudomonas aeruginosa, the results showed a significant effect against MDR isolates. Gold nanoparticle was loaded with ceftazidium antibiotic in order to improve the antibacterial activity and drug delivery efficiency. The synergistic effects of biosynthesize gold loaded with ceftazidium antibiotic at different concentration against MDR bacteria were also investigated. The result showed that ceftazidium-loaded nanoparticles have superior effectiveness compared to native ceftazidium against pseudomonas aeruginosa.

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Su, Yu-Lin y Shang-Hsiu Hu. "Functional Nanoparticles for Tumor Penetration of Therapeutics". Pharmaceutics 10, n.º 4 (18 de octubre de 2018): 193. http://dx.doi.org/10.3390/pharmaceutics10040193.

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Theranostic nanoparticles recently received great interest for uniting unique functions to amplify therapeutic efficacy and reduce side effects. Despite the enhanced permeability and retention (EPR) effect, which amplifies the accumulation of nanoparticles at the site of a tumor, tumor heterogeneity caused by the dense extracellular matrix of growing cancer cells and the interstitial fluid pressure from abnormal angiogenesis in the tumor inhibit drug/particle penetration, leading to inhomogeneous and limited treatments. Therefore, nanoparticles for penetrated delivery should be designed with different strategies to enhance efficacy. Many strategies were developed to overcome the obstacles in cancer therapy, and they can be divided into three main parts: size changeability, ligand functionalization, and modulation of the tumor microenvironment. This review summarizes the results of ameliorated tumor penetration approaches and amplified therapeutic efficacy in nanomedicines. As the references reveal, further study needs to be conducted with comprehensive strategies with broad applicability and potential translational development.

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Varma, Lanke Tejesh, Nidhi Singh, Bapi Gorain, Hira Choudhury, Murtaza M. Tambuwala, Prashant Kesharwani y Rahul Shukla. "Recent Advances in Self-Assembled Nanoparticles for Drug Delivery". Current Drug Delivery 17, n.º 4 (27 de junio de 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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Zvereva, Elena E., Stefan Grimme, Sergey A. Katsyuba, Vadim V. Ermolaev, Daria A. Arkhipova, Ning Yan, Vasili A. Miluykov, Oleg G. Sinyashin y Alexey Aleksandrov. "Solvation and stabilization of palladium nanoparticles in phosphonium-based ionic liquids: a combined infrared spectroscopic and density functional theory study". Phys. Chem. Chem. Phys. 16, n.º 38 (2014): 20672–80. http://dx.doi.org/10.1039/c4cp02547d.

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Ali, Zeeshan, Chuanxiang Zhang, Junchen Zhu, Gang Jin, Zhifei Wang, Yanqi Wu, Muhammad Ammar Khan, Jianguo Dai y Yongjun Tang. "The Role of Nanotechnology in Food Safety: Current Status and Future Perspective". Journal of Nanoscience and Nanotechnology 18, n.º 12 (1 de diciembre de 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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Wang, Yanhua, Jun Ma, Lei Zhou, Jin Chen, Yonghui Liu, Zhiye Qiu y Shengmin Zhang. "Dual functional selenium-substituted hydroxyapatite". Interface Focus 2, n.º 3 (28 de marzo de 2012): 378–86. http://dx.doi.org/10.1098/rsfs.2012.0002.

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Hydroxyapatite (HA) doped with trace elements has attracted much attention recently owing to its excellent biological functions. Herein, we use a facile co-precipitation method to incorporate selenium into HA by adding sodium selenite during synthesis. The obtained selenium-substituted HA products are needle-like nanoparticles which have size and crystallinity that are similar to those of the pure HA nanoparticles (HANs) when the selenium content is low. HANs are found to have the ability to induce the apoptosis of osteosarcoma cells, and the anti-tumour effects are enhanced after incorporation of selenium. Meanwhile, the nanoparticles can also support the growth of bone marrow stem cells. Furthermore, the flow cytometric results indicate that the apoptosis induction of osteosarcoma cells is caused by the increased reactive oxygen species and decreased mitochondrial membrane potential. These results show that the selenium-substituted HANs are potentially promising bone graft materials in osteosarcoma treatment due to their dual functions of supporting normal cell growth and inducing tumour cell apoptosis.

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Lee, Min-Jae y A. Young Sung. "Characterization and Compatibility of High Oxygen Permeable Ophthalmic Biomaterial Containing Silane with Cobalt Oxide Nanoparticles". Journal of Nanoscience and Nanotechnology 20, n.º 11 (1 de noviembre de 2020): 6954–58. http://dx.doi.org/10.1166/jnn.2020.18819.

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This research is conducted to analyze the compatibility of used monomers and produce the high functional hydrogel ophthalmic polymer containing silane and nanoparticles. Vinyltrimethoxysilane (VTMS) and cobalt oxide nanoparticles are used as additives for the basic combination of silicone monomer (Sil-H) and methyl methacrylate (MMA). And also, the materials are copolymerized with ethylene glycol dimethacrylate (EGDMA) as the cross-linking agent, photo polymerization initiator (2H2M) as the initiator. It is judged that the lenses of all combinations are optically excellent and thus have good compatibility. Measurement of the optical and physical characteristics of the manufactured hydrophilic ophthalmic polymer are different in each case. Especially VTMS with cobalt oxide nanoparticle increases the oxygen permeability by the addition of cobalt nanoparticles. These materials are considered to make synergy effect each other, so it can be used in functional hydrogel ophthalmic lenses.

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Ruiz-Hitzky, Eduardo, Pilar Aranda, Marwa Akkari, Nithima Khaorapapong y Makoto Ogawa. "Photoactive nanoarchitectures based on clays incorporating TiO2 and ZnO nanoparticles". Beilstein Journal of Nanotechnology 10 (31 de mayo de 2019): 1140–56. http://dx.doi.org/10.3762/bjnano.10.114.

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Thought as raw materials clay minerals are often disregarded in the development of advanced materials. However, clays of natural and synthetic origin constitute excellent platforms for developing nanostructured functional materials for numerous applications. They can be easily assembled to diverse types of nanoparticles provided with magnetic, electronic, photoactive or bioactive properties, allowing to overcome drawbacks of other types of substrates in the design of functional nanoarchitectures. Within this scope, clays can be of special relevance in the production of photoactive materials as they offer an advantageous way for the stabilization and immobilization of diverse metal-oxide nanoparticles. The controlled assembly under mild conditions of titanium dioxide and zinc oxide nanoparticles with clay minerals to give diverse clay–semiconductor nanoarchitectures are summarized and critically discussed in this review article. The possibility to use clay minerals as starting components showing different morphologies, such as layered, fibrous, or tubular morphologies, to immobilize these types of nanoparticles mainly plays a role in i) the control of their size and size distribution on the solid surface, ii) the mitigation or suppression of the nanoparticle aggregation, and iii) the hierarchical design for selectivity enhancements in the catalytic transformation and for improved overall reaction efficiency. This article tries also to present new steps towards more sophisticated but efficient and highly selective functional nanoarchitectures incorporating photosensitizer elements for tuning the semiconductor–clay photoactivity.

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Kasim, Syahruddin, Paulina Taba, Ruslan y Romi Anto. "Sintesis Nanopartikel Perak Menggunakan Ekstrak Daun Eceng Gondok (Eichornia crassipes) Sebagai Bioreduktor". KOVALEN: Jurnal Riset Kimia 6, n.º 2 (1 de septiembre de 2020): 126–33. http://dx.doi.org/10.22487/kovalen.2020.v6.i2.15137.

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Nanoparticles was done by adding water hyacinth leave extract to AgNO3 2mM solution with a ratio of 1:40. Formed silver nanoparticles were analyzed using UV-Vis spectrophotometer, SEM, XRD, PSA, and FTIR to determine its characteristics. Results showed that absorbance value increased if reaction time is increased. Maximum absorption was obtained at wavelength 432-446 nm by using UV-Vis spectrophotometer. Result of PSA analysis shows that the average size of silver nanoparticles formed is 93.2 nm while XRD analysis shows that the average crystal size of silver nanoparticles is 50.11 nm, with round shape and amorphous. Result of FTIR analysis to determine functional group that contributes to nanoparticle synthesis shows the contribution of OH group. Keywords: reduction method, silver nanoparticles, Eichornia crassipes, bioreductor

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Ignjatovic, Nenad, Smilja Markovic, Dragana Jugovic, Vuk Uskokovic y Dragan Uskokovic. "From molecules to nanoparticles to functional materials". Journal of the Serbian Chemical Society 85, n.º 11 (2020): 1383–403. http://dx.doi.org/10.2298/jsc200426035i.

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Functional nanomaterials have held a steady position at the frontier of materials science and engineering in the 21st century. ?Molecular Designing of Nanoparticles with Controlled Morphological and Physicochemical Characteristics and Functional Materials Based on Them? was the title of the research project funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia and performed between 2011 and 2019 in the interdisciplinary area of nanoscience and nanotechnologies. Research activities within this program were divided into five interrelated topics: 1) from molecules to nanoparticles; 2) advanced ceramics with improved functional properties; 3) electrode materials for lithium?ion batteries; 4) nano-calcium phosphate in preventive and regenerative medicine; 5) biodegradable microand nano-particles for the controlled delivery of medicaments. This report gives an insight into this bibliographically most impactful Serbian national project on nanotechnologies executed within the aforementioned nine-year cycle, 2011?2019, focusing here only on the results achieved in the past three years. The project provided an outstanding and internationally recognized contribution to synthesis, characterization and functional design of a number of materials systems, including pure and lanthanide?doped hydroxyapatite, zinc oxides, sodium cobaltates, lithium iron pyrophosphates, lithium iron silicates and a number of polymeric systems.

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MURAKAMI, Kouichi. "Synthesis of Functional Nanoparticles by Laser Ablation". Review of Laser Engineering 28, n.º 6 (2000): 332. http://dx.doi.org/10.2184/lsj.28.332.

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