Relevant bibliographies by topics / Metal-containing nanoparticles

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  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Metal-containing nanoparticles'

Author: Grafiati
Published: 25 May 2024

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Journal articles on the topic "Metal-containing nanoparticles"

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Wang, Ji Fen, Hua Qing Xie, Zhong Xin, Yang Li, and Jing Li. "Thermal Properties of Composites Containing Metal Oxide Nanoparticles." Materials Science Forum 694 (July 2011): 146–49. http://dx.doi.org/10.4028/www.scientific.net/msf.694.146.

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We prepared a series of paraffin wax (PW) based phase change composite containing ZnO, Al2O3 and Fe2O3 nanoparticles, respectively. DSC results showed that there is a decrease trend in phase change latent heat capacity (Ls) with an increase of metal oxide nanoparticle loadings. ZnO/PW has higher Ls than those of Fe2O3/PW and Al2O3/PW with same metal oxide nanoparticle loadings. Transient short-hot-wire (SHW) method was used to measure thermal conductivity of these composites. The results showed that nanoparticle addition leads to substantial enhancement in the thermal conductivity of the composites. The highest thermal conductivity of the measured composites is about 0.27 W/(m•K) of Fe2O3/PW with 3.0 wt% nanoparticles and Al2O3/PW with 5.0 wt% nanoparticles at 15 oC, which higher than that of PW by about 30%. The lowest thermal conductivity of composites is that of Al2O3/PW and ZnO/PW with 1.0 wt% nanoparticles at 60 oC, which higher than that of PW by about 7%.
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Kapustina, E. A., E. A. Titov, and М. А. Novikov. "GENOTOXICITY OF METAL-CONTAINING NANOPARTICLES." Aerospace and Environmental Medicine 56, no. 1 (2022): 26–31. http://dx.doi.org/10.21687/0233-528x-2022-56-1-26-31.

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No more than 100 nm large, nanoparticles (NPs) are distinguished by unusual mechanical, electrical, optical, thermal and magnetic properties. They are used in biology, pharmacology, medicine, chemistry, physics, materials technology and engineering industry. Nanoparticles penetrate in organism through the skin, GIT and airways. Their genotoxicity depends on size, form, mode of action and composition. Two principal mechanisms of NPs genotoxicity are primary and secondary. The primary mechanism is realized in direct interaction with the genome; the secondary mechanism is achieved through mediation of the active forms of oxygen. NPs can modulate the epigenome by altering the gene functions and do not change the DNA sequence directly. Consequences of prolonged exposure to low NPs doses on the human organism still remain uninvestigated.
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Zheng, Bin, Mutsunori Uenuma, Yukiharu Uraoka, and Ichiro Yamashita. "Bioconjugates Containing Ferritin and Metal Nanoparticles." Advanced Materials Research 463-464 (February 2012): 833–36. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.833.

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Novel assemblies of gold nanoparticles or gold nanoparticles with other inorganic nanoparticles have received considerable interest due to their fascinating properties desired for various detection applications. Here we present a bioconjugate containing ferritin and gold nanoparticles. In this bioconjugate, there is a central ferritin, and a several gold nanoparticles are located around by DNA base-pairing.
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Kurbanova, N. I., Z. N. Huseynova, N. Y. Ishenko, A. T. Aliyev, T. M. Guliyeva, S. K. Ragimova, and S. A. Rzaeva. "METAL-CONTAINING NANOPARTICLES IN A MALEINIZED POLYETHYLENE MATRIX AS NANOFILLERS FOR POLYPROPYLENE." Azerbaijan Chemical Journal, no. 1 (March 19, 2019): 54–58. http://dx.doi.org/10.32737/0005-2531-2019-1-54-58.

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Liu, Fangfei, and Xiong Liu. "Amphiphilic Dendronized Copolymer-Encapsulated Au, Ag and Pd Nanoparticles for Catalysis in the 4-Nitrophenol Reduction and Suzuki–Miyaura Reactions." Polymers 16, no. 8 (April 12, 2024): 1080. http://dx.doi.org/10.3390/polym16081080.

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The branched structures of dendronized polymers can provide good steric stabilization for metal nanoparticle catalysts. In this work, an amphiphilic dendronized copolymer containing hydrophilic branched triethylene glycol moieties and hydrophobic branched ferrocenyl moieties is designed and prepared by one-pot ring-opening metathesis polymerization, and is used as the stabilizer for metal (Au, Ag and Pd) nanoparticles. These metal nanoparticles (Au nanoparticles: 3.5 ± 3.0 nm; Ag nanoparticles: 7.2 ± 4.0 nm; Pd nanoparticles: 2.5 ± 1.0 nm) are found to be highly active in both the 4-nitrophenol reduction and Suzuki–Miyaura reactions. In the 4-nitrophenol reduction, Pd nanoparticles have the highest catalytic ability (TOF: 2060 h−1). In addition, Pd nanoparticles are also an efficient catalyst for Suzuki–Miyaura reactions (TOF: 1980 h−1) and possess good applicability for diverse substrates. The amphiphilic dendronized copolymer will open a new door for the development of efficient metal nanoparticle catalysts.
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Paulraj, Prabhavathi, Sankareswaran Muruganantham, Anbalagan S, Manikandan A, and Karthikeyan G. "GREEN SYNTHESIS AND CHARACTERIZATION OF SILVER NANOPARTICLES FROM WITHANIA SOMNIFERA (L.) DUNAL." Asian Journal of Pharmaceutical and Clinical Research 9, no. 5 (September 1, 2016): 34. http://dx.doi.org/10.22159/ajpcr.2016.v9i5.13204.

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ABSTRACTThe metal nanoparticle synthesis is highly explored the field of nanotechnology. The biological methods seem to be more effective because of slowreduction rate and polydispersity of the final products. The main aim of this study is too the rapid and simplistic synthesis of silver nanoparticlesby Withania somnifera Linn. at room temperature. The exposure of reaction mixtures containing silver nitrate and dried leaf powder of W. somniferaresulted in reduction of metal ions within 5 minutes. The extracellular synthesized silver nanoparticles were characterized by ultraviolet-visible,infrared (IR) spectroscopy, X-ray diffraction studies, zeta potential, Fourier transform IR, and scanning electron microscopy. The antibacterial andantifungal studies showed significant activity as compared to their respective standards. From the results, W. somnifera sliver nanoparticle has attainedthe maximum antimicrobial against clinical pathogens and also seen very good stability of nanoparticle throughput processing. As we concluded, thistype of naturally synthesized sliver nanoparticle could be a better green revolution in medicinal chemistry.Keywords: Antimicrobial activity, Silver nanoparticles, Withania somnifera.
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Batsmanova, Ludmila, Nataliya Taran, Yevheniia Konotop, Svitlana Kalenska, and Nataliya Novytska. "Use of a colloidal solution of metal and metal oxide-containing nanoparticles as fertilizer for increasing soybean productivity." Journal of Central European Agriculture 21, no. 2 (2020): 311–19. http://dx.doi.org/10.5513/jcea01/21.2.2414.

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Gouda, M., AA Hebeish, and AI Aljaafari. "New route for development of electromagnetic shielding based on cellulosic nanofibers." Journal of Industrial Textiles 46, no. 8 (January 21, 2016): 1598–615. http://dx.doi.org/10.1177/1528083715627166.

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A radically new innovation was established for development of electromagnetic interference shielding. The innovation emphasis synthesis of carboxymethyl cellulose (CMC), carboxymethyl cellulose composite containing different metal nanoparticles (CMC-MNPs), and carboxymethyl cellulose nanofiber mat (CMC-NF) and carboxymethyl cellulose containing metal nanofiber mat (CMC-MNPs nanofiber mat) by electrospinning technique. Metal nanoparticles used include copper nanoparticles, iron nanoparticles, zinc nanoparticles, cadmium nanoparticles, and cobalt nanoparticles. Synthesized CMC–MNPs were characterized by using scanning electron microscopy coupled with high-energy dispersive X-ray and UV–visible spectroscopy that was used for confirmation of nanoparticles formation. The scanning electron microscopy images clearly showed regular flat shape with semiporous surface. All metal nanoparticles were well distributed inside the backbone of the cellulose without aggregation. The average particle diameter was 29–39 nm for zinc nanoparticles, 29–33 nm for cadmium nanoparticles, 25–33 nm for cobalt nanoparticles, 23–27 nm for copper nanoparticles, and 22–26 nm for iron nanoparticles. Electrospun carboxymethyl cellulose and CMC–MNPs nanofiber mats were synthesized by electrospinning technique and characterized using scanning electron microscopy, energy dispersive X-ray, and transmission electron microscopy. Scanning electron microscopy images of electrospun carboxymethyl cellulose and CMC–MNPs nanofibers reveal smooth and uniformly distributed nanofibers without bead formation with average fiber diameters in the range of 300–450 nm. Moreover, the diameters of electrospun carboxymethyl cellulose nanofiber mat were not affected by the presence of metal nanoparticles. Metal nanoparticles’ content inside the electrospun CMC–MNPs nanofibers was investigated by using atomic absorption spectroscopy. Electromagnetic interference shielding of electrospun carboxymethyl cellulose and CMC–MNPs nanofiber mats was evaluated. Data showed that the EMI-SE was increased in presence of metal nanoparticles and depending on both the metal nanoparticle contents and the electrical conductivity of metal nanoparticles.
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Валуева, С. В., Л. Н. Боровикова, М. Э. Вылегжанина, О. В. Назарова, and Е. Ф. Панарин. "Стабилизированные (био)полимерами наночастица металлов и металлоида: спектральные и структурно-морфологические характеристики." Журнал технической физики 92, no. 7 (2022): 924. http://dx.doi.org/10.21883/jtf.2022.07.52645.315-21.

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A comparative study of the spectral and structural-morphological characteristics of the metal (copper, silver) and metalloid (selenium) containing nanodispercions based on biocompatible water-soluble stabilizers: bovine serum albumin, random copolymers of 2-deoxy-2-methacrylamide-D-glucose or 4-acryloyl-morpholine with 2-dimethylaminoethyl-methacrylate was carried out by means of the UV-spectroscopy, atomic-force and transmission electronic microscopy. Effect of the nature of the nanoparticle as well as polymeric stabilizer on the spectral and structural-morphological characteristics and mechanism of formation of the nanostructures/nanoparticles was shown. It has been established that structures with different organization of the organic phase around nanoparticles are formed in the studied nanodispersions. It has been shown that for the studied polymer carriers, metal-containing nanostructures/nanoparticles have smaller dimensions than metalloid-containing systems.
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Kalenskii, A. V., A. A. Zvekov, E. V. Galkina, and D. R. Nurmuhametov. "Modeling spectral properties of transparent matrix composites containing core-shell nanoparticles." Computer Optics 42, no. 2 (July 24, 2018): 254–62. http://dx.doi.org/10.18287/2412-6179-2018-42-2-254-262.

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Optical properties of transparent matrix composites containing metal nanoparticles coated with an oxide shell were numerically simulated based on the Aden-Kerker theory applicable for concentric spheres. Using pentaerythritol tetranitrate composites (containing Al/Al2O3 nanoparticles) as an example, the linear scattering and absorption coefficients as well as the total reflectance and transmittance and collimated beam transmittance were shown to be determined by the sample thickness, the nanoparticle radius, the mass fraction of nanoparticles, and mass fraction of the oxide in the nanoparticles. An approach to determining the said parameters based on the comparison of the calculated spectral dependencies of the reflectance and transmittance with the experimental ones was suggested. The nanoparticle radius was determined with the minimum error (of about 2 – 3 %), while the nanoparticle mass fraction and oxide mass fraction were weak parameters determined with a 25 % error.
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Dissertations / Theses on the topic "Metal-containing nanoparticles"

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Ferrari, Federico. "Synthesis of Metal-Binding Ligand-Containing Copolymers, Nanoparticles and Blends." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19186/.

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In this thesis we developed three copper-containing systems. Copper shows intriguing abilities in photocatalysis, however, one of the major limitations of many copper complexes is that photochemical properties might be quenched in solution caused by π-interactions between solvent and solute, due to Jahn-Teller distortion in the excited state. As such, we herein seek to synthesise copper heteroleptic complexes that will subsequently be nanoprecipitated with a polymer. This will allow the polymer to encase the complex and prevent the solvent-induced quenching. Subsequently, the preparation of blends of polymer with the aforementioned copper complexes, at different weight ratios is sought. The preparation of the blend is particularly interesting as the catalytic properties are anticipated to be inferior on account of the low surface area. However, owing to the polymer matrix better, mechanical properties are anticipated. The blends can combine the mechanical properties of the polymer and the luminescence of the complex, with the advantage that the polymer matrix can also prevent quenching from oxygen. As final task, we developed a copper-containing monomer. The synthesis of a monomer that contains copper and can be excited under ultraviolet (UV) light is particularly interesting.
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Yu, Zhao. "Syntheses and Sensing Applications of Modified Noble Metal-containing Nanoparticles." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1623251284619434.

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Donoeva, Baira. "Study of catalytic and biological activity of gold-containing metal nanoparticles." Thesis, University of Canterbury. Chemistry, 2014. http://hdl.handle.net/10092/9761.

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Small particles of gold (< 100 nm) have attracted great interest among researchers due to the unique combination of their physicochemical properties. Among various research areas catalysis and bio-nanotechnology represent the largest areas of growth for gold nanoparticle research. Catalysts play a crucial role in the life of the modern society. More than 85 % of all chemical processes are catalytic, and this number is increasing every year. There is a constant demand to develop more efficient and durable catalysts in order to address increasing energy demands and environmental requirements. The first part of the thesis is focused on the study of catalytic activity of supported gold and mixed-metal catalysts, derived from atomically precise phosphine-stabilised gold and mixed-metal clusters in the liquid-phase oxidation of cyclohexene and one-pot synthesis of imines. Various characterisation techniques (TEM, diffuse-reflectance UV-vis, XPS, etc.) as well as kinetic studies were used in order to establish the optimal structure of gold catalysts. The effect of catalytic support, nature of hetero-metal atom for mixed metal-systems and type of catalyst pre-treatment were also examined. Gold nanoparticles are actively studied in various biomedical applications as they are offering new approaches to the detection and treatment of life-threatening diseases, such as cancer. The second part of this work discusses our preliminary investigations of biological activity of gold nanoparticles, stabilised with cancer-targeting molecules. In particular, the cytotoxicity of gold nanoparticles was studied using 11 different cancer and normal cell types. Gold uptake and particle localisation inside the cells were also investigated.
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Buso, Dario. "Sol-Gel Films containing Metal and Semiconductor Nanoparticles for Gas Sensing." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3426274.

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Nanotechnology is an exciting modern research field encompassing the traditionally specialist disciplines of chemistry, physics and engineering. Optics and catalysis are two areas of application that will continue to benefit from the recent improvements in control of materials morphology at the nano-scale. The work presented in this thesis is focussed on the application of the Sol-Gel technique in the realization of thin inorganic layers containing metal and semiconductor nanoparticles that are capable of reversibly of detecting gas phase analytes. Three synthetic approaches were adopted, each of them characterized by a systematic increase of the final materials morphology, structure and micro-structure control. This materials engineering was essential in order for nanocomposites with the desired optical and chemical properties applicable to gas sensing devices to be obtained. The synthesized layers comprised of an inorganic porous matrix (SiO2, TiO2 and NiO) containing nanosized metal (Au, Pt) or semiconductor crystals (NiO), and were shown to be active materials for chemical recognition of H2 and CO. The films were readily deposited onto different sensing supports, leading to successful gas detection via optical, conductometric and surface acoustic wave interfaces. SiO2-NiO-Au systems are capable to selectively detect H2 using an optical interface thanks to a marked wavelength dependence of its sensitivity toward this specie. However, if a peculiar NiO-Au morphology is obtained inside the SiO2 support CO is more likely to be detected. TiO2-Au thin films are shown to be excellent conductometric sensors for H2 detection, and ideal gas-sensing dynamics have been observed in this case. This class of layers demonstrated to be effective also for H2 detection through a Surface Acoustic Wave (SAW) interface. Monolayers of Au nanoparticles covered by a thin NiO layer showed promising sensing dynamics in the optical recognition of H2. In this case the material synthesis allows for a detailed control of the single nanocomposite constituents, thus opening the possibility for a finer tuning of the sensor sensitivity.
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Gankanda, Aruni. "Heterogeneous and multiphase chemistry of trace atmospheric gases with mineral dust and other metal containing particles." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3090.

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Particulate matter in the atmosphere emitted from various natural and anthropogenic sources is important due to their effects on the chemical balance of the atmosphere, the Earth's climate, human health and biogeochemical cycles. Although there have been many studies performed to understand the above effects, there still remains substantial uncertainty associated with processes involved and thus it is difficult for current atmospheric chemistry and climate models to reconcile model results with field measurements. Therefore, it is important to have better agreement between models and observations as the accuracy of future atmospheric chemistry and climate predictions depends on it. In this research, a greater understanding of the role of mineral dust chemistry was pursued through focused laboratory studies in order to better understand fundamental processes involved. In particular, studies to further understand the photochemistry of adsorbed nitrate, an important inorganic ion associated with particulate matter exposed to gas-phase nitrogen oxides, were conducted using Al2O3, TiO2 and NaY zeolite to represent non-photoactive components, photoactive components and aluminosilicate respectively, present in mineral dust. These studies reveal that photochemistry of nitrate adsorbed on mineral dust is governed by wavelength of light, physicochemical properties of dust particles and adsorption mode of nitrate. Gas phase NO2, NO and N2O are the photolysis products of nitrate on oxide particles under dry conditions. In contrast, nitrate adsorbed on zeolite is converted mainly to adsorbed nitrite upon irradiation. This nitrite yield is decreased with increasing relative humidity. Gas phase N2O is the main photolysis product of nitrate adsorbed in zeolite in the presence of co-adsorbed ammonia. Water adsorbed on semiconducting TiO2 can be photochemically converted to hydroxyl radicals. These hydroxyl radicals can be involved in surface mediated as well as gas phase oxidation reactions in the presence of cyclohexane. Another focus of this dissertation was to investigate the oxidation of sulfur dioxide oxidation in the presence of mineral aerosol, particularly, coal fly ash (FA), γ-Fe2O3 and Arizona test dust (AZTD), a model for mineral dust aerosol. Depending on the temporal evolution of Fe(II), we proposed that S(IV) oxidation in the presence of FA and γ-Fe2O3 initially occurs through a heterogeneous pathway and a homogeneous pathway is also possible over later time scales. S(IV) oxidation in the presence of AZTD appears to be mostly heterogeneous and does not lead to iron dissolution. Overall, these studies suggest that the rate, extent and products of atmospheric S(IV) oxidation can be highly variable and heavily dependent upon the nature of aerosol sources, thereby precluding simple generalizations about this reaction when modeling atmospheric processes involving diverse mineral dust aerosols. With the recent development in nanotechnology, nanoparticles are becoming a major fraction of atmospheric particulate matter. These particles can undergo aging under ambient conditions at any stage of their life cycle. This impacts the fundamental properties of these materials and therefore the behavior in the environment and interactions with biomolecules and biological systems. ZnO and CuO nanoparticles form adsorbed carbonate phases upon exposure to CO2 and water vapor. These carbonates become more solvated as the relative humidity is increased. Presence of carbonate phases on ZnO particles increases their water solubility. Thus, overall the work reported in this dissertation provides insights into heterogeneous and multiphase atmospheric chemical reactions in the presence of mineral aerosol and atmospheric aging of nanoparticles.
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André, Rémi F. "Tailored routes to metal-containing nanoparticles for hydrogenation reactions in solution : surface design for H2 activation." Electronic Thesis or Diss., Sorbonne université, 2021. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2021SORUS190.pdf.

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Dans ces travaux de thèse, nous avons exploré différentes classes de nanoparticules métalliques telles que des carbures, des oxydes et des phosphures, pour des applications en catalyse colloïdale. Afin de construire un système catalytique de type « Paire de Lewis Frustrée », la synergie avec des bases de Lewis moléculaires a été étudiée. En introduction, les enjeux et les défis de l’activation de H2 en solvant sont présentés, avec un focus sur les catalyseurs non purement métalliques pour l’hydrogénation de composés modèles. Dans la première partie, des carbures et des hydrures de métaux de début de transition ont été synthétisés par métathèse solide-solide. Nous avons exploré l’influence de différents paramètres de procédé sur la spéciation de phase des produits. Les catalyseurs supportés les plus prometteurs, Mo2C/C et W2C/C, ont été étudiées pour l’hydrogénation d’oléfines en phase gaz et en solvant. Dans la deuxième partie, des oxydes de cerium et d’indium ont été produits par voie hydrothermale. L’importance de défauts d’oxygène dans CeO2-x pour l’activation de H2 en phase gaz et pour la semi-hydrogénation du phénylacétylène a été établie. La dernière partie est dédiée à la synthèse solvothermale d’oxydes de molybdène et de tungstène, ainsi qu’à celle de carbure et de phosphures de nickel. Les mécanismes de synthèse ont été étudiés par RMN pour la partie organique et par XAS et DRX pour la partie inorganique. L’activité catalytique des nanoparticules non supportées a finalement été évaluée pour l’hydrogénation du nitrobenzène et du phénylacétylène dans plusieurs solvants
In this thesis work, the use of metal-containing nanoparticles such as carbides, oxides and phosphides is explored for colloidal catalysis. In an attempt to build a Frustrated Lewis Pair (FLP)-like catalytic system for H2 activation, the synergy with a molecular Lewis base is assessed. In the bibliographic introduction, the stakes and the challenges of H2 activation in solvent are presented, with an emphasis on the use of non-purely metallic catalysts for the hydrogenation of model compounds. In the first part, early transition metal carbides and hydrides are synthesized via solid-state metathesis. The influence of process parameters is explored to tune the phase speciation in the products. The most promising carbon-supported catalysts, Mo2C/C and W2C/C, are studied for gas phase and liquid phase hydrogenations of olefins. In the second part, cerium and indium oxides are obtained via hydrothermal pathways. The relevance of oxygen defects in CeO2-x is established for H2 gas phase activation and semi-hydrogenation of phenylacetylene in solvent. The last part is dedicated to the non-aqueous syntheses of molybdenum and tungsten oxides, and nickel carbide and phosphides. The syntheses mechanisms are studied by means of NMR for the organic species and XAS and XRD for the nature of the inorganic species. The catalytic activity of the unsupported nanoparticles is finally evaluated for the hydrogenation of nitrobenzene and phenylacetylene in various solvents
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Lee, W. W. Y. "Polymer films containing SERS active metal nanoparticles for therapeutic drug monitoring and forensic analysis." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678709.

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The work in this thesis was centred on developing an alternative method for therapeutic drug monitoring based on using microneedle arrays to sample interstitial fluid combined with a SERS active layer for analysis of the sampled fluid. Simple aqueous colloids are too unstable to use in this application so here the colloid was aggregated and then preserved within hydroxyethylcellulose (HEC) films. The films were then tested alongside microneedle arrays, which were prepared and developed by Salvador and Donnelly in the School of Pharmacy, Queen's University Belfast. The principle was that the microneedle arrays would puncture the skin to take up the interstitial fluid containing therapeutic drugs and deliver it to the base plate where the SERS sensing HEC film would be located. The SERS films themselves were found to be effective for the analysis of the target thetapeutic drugs, theophylline and phenytoin. However, when the drugs were taken up by microneedle arrays they were largely trapped within them. The SERS films were found to have a much broader range of potential applications than therapeutic drug monitoring. They were shown not simply to be able to detect conventional aqueous solutions of drugs but they were used as the basis for a novel trace drug detection method. In this method the area to be tested was wiped with a moistened swab which was then contacted with the SERS active film. With mephedrone as a test analyte, drug deposits on surfaces in the Ilg range could be collected and detected. Alternatively, for seized bulk methiopropamine drug samples which had high fluorescence, the films provided a convenient method of quenching the fluorescence and enhancing spectra simultaneously. Finally, the films were also tested for use in analysis of ink samples and proved to be highly effective, providing spectra that allowed various inks to be discriminated.
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Erhard, Felix Maria Maximilian. "Synthesis and catalytic applications of ruthenium- and iron-based nanoparticles from the pyrolysis of metal-containing homopolymers and block copolymers." Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658315.

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This Thesis is concerned with the synthesis of new Fe- and Rucontaining homopolymers and block copolymers and their applications as precursors for the fabrication of catalytically active nanoparticles upon pyrolysis (NPs). The strained sila[l]ferrocenophane (T]-CSH4) Fe(T]-CsH4)SiMeRc has been synthesised. Two different routes for its synthesis Were employed and compared. The compound was polymerised via thermal ringopening polymerisation (ROP), which afforded insoluble polymeric material. Photo controlled ROP. was used to afford narrowly dispersed, high molecular . weight (Mn between 10,000 and 53,000 Da) air and moisture stable [(T]CsH4) Fe(T]-CsH4)-SiMeRc]n. Electrochemical characterisation of (T]-CsH4)Fe(T]CsH4)- SiMeRc revealed unusual, concentration dependent behaviour associated with the pendant Rc substituent. We postulate a dimerisation pathway based on Ru-Ru bond formation upon oxidation of the Rc side . groups. The synthesis of the block copolymer PSm-b-[(T]-CsH4)Fe(T]-CsH4)SiMeRc] n was carried out and afforded narrowly dispersed block copolymers of high molecular weight (Mn between 28,000 and 36,000 Da). The synthesis of Fe(T]-CsH4)zSi(Me)(C=CSiMe3) and its photocontrolled polymerisation to yield high molecular weight (Mn between 13,000 and 45,500 Da) [Fe(T]-CsH4)zSi(Me)(C=CSiMe3)]n is also presented. Deprotection and clusterisation with RU3(CO)12 yielded the highly metalen, riched compound [Fe( T]-CsH4)zSiCH3{(Il-H)Ru3(CO)9Cz}]n. UV -irradiation was utilised for cross-linking reactions, which proceeded readily. The block copolymers PSm-h-[Fe(T]-CsH4)zSi(Me)(C=CSiMe3)]n and PSm~h-[Fe(T]CsH4) zSiCH3{(Il-H)Ru3(CO)9CZ}]n were prepared. The fabrication of metal-containing nanoparticles (NPs) via pyrolysis of the metallopolymers was carried out via bulk' and thin film pyrolysis between 500 and 1000°C. Analysis of the resulting materials revealed the formation of RuSi, RuzFeSi, RU4Fe and/or Ru NPs, depending on the material and pyrolysis temperature. The particles were embedded in a carbonaceous matrix. The catalytic activity towards hydrogenation of cyclohexene by the particles formed via pyrolysis of thin films was investigated and showed some catalytic activity. The synthesis of a metallopolymer for the fabrication of monometallic Ru NPs is also discussed.
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Mirza, Nasiri Nooshin Mirza. "Novel Metal-Containing Nanoparticle Composites for Cancer Therapy and Imaging." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1707253/.

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With all the improvements in cancer treatments, multidrug resistance is still the major challenge in treating cancer. Cells can develop multidrug resistance (MDR) during or after treatment, which will render the cancer cells resistant not only to the chemotherapy drug being used but also to many other structurally- and mechanically-different chemotherapeutics. In the first project, the main focus was on development of drug resistant cell lines by selection with taxol. Gene changes in the L1T2 cell line after treatment with Taxol was studied. Treatment of L1T2 cells with taxol leads to changes in the expression of ABC transporter proteins, whereas the combination of Taxol with protease inhibitors leads to increased efficacy via inhibition of P-glycoprotein (P-gp). In the second project, we showed that our innovatively-designed Au-loaded poly(lactide-co-glycolic acid) nanoparticles (GPLGA NPs) are able to cross biological barriers and deliver inside the cells without being recognized by the ABC protein transporter. (We focus specifically on P-gp-mediated drug efflux in a model of HEK cell lines.) The concentration of gold was measured using inductively-coupled plasma/mass spectrometry (ICP-MS) after 6- and 24-hour treatment of GPLGA NPs, which did not show significant increase of gold inside the cells in presence of the P-gp inhibitor valspodar. Cancer cells were treated with the GPLGA NPs for 24 hours and then irradiated 5 minutes at 1Wcm-2 using laser settings at 680 or 808 nm. Heat generation in cancer cells, after internalizing GPLGA NPs and laser irradiation, was significant irrespective of laser wavelength. The plasmomic heating response in this in vitro model can be a step closer to overcome MDR. Finally, for the third and last project represented in this dissertation, the focus was on the design and synthesis of innovative, biodegradable PLGA NPs, encapsulated with the platinum(II)-based non-organometallic/non-cyclometalated phosphorescent complex PTA = [Pt(ptp)2], a brightly phosphorescent complex (ptp = square-planar bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]). Size-tunable, emission-polarized phosphorescent PTA-loaded PLGA NPs were synthesized using a single-emulsion, solvent evaporation technique. Photoluminescence characterization shows that PTA-loaded PLGA NPs exhibit strong and stable orange emission with peak maximum ~ 580 nm. The photoluminescence quantum yield (QY) of the synthesized PTA-PLGA NPs was evaluated at ~55%, which allows recording of images with a much better contrast than that with PTA in organic solvents without the PLGA (QY ~0.5% and ~0 emission polarization) or even that with typical fluorescent organic dyes like rhodamines.
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Lê, Thi Kim-Chi. "Oxygen Reduction Reaction with Molybdenum-Containing Oxysulfide Nanoparticles : from Colloidal Synthesis to Surface Activity." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS209.pdf.

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Aujourd'hui, dans les véhicules individuels, les piles à combustible concurrencent les batteries Li-ion par de nombreux avantages. Donc, remplacer les métaux nobles par des métaux plus abondants dans des catalyseurs est essentiel pour les rendre abordables. Le molybdène peut être un bon candidat puisque certains composés (ex. MoS2, MoO2) ont une activité pour la réduction de l’oxygène (ORR). Les oxysulfures de molybdène, relativement méconnus, pourraient être utilisés comme électrodes pour les batteries Li-ion ou les catalyseurs grâce à leur structure poreuse sous formes amorphes (couches minces et poudres massives). Leur synthèse colloïdale à basse température, favorisant les matériaux nanométriques et évitant des synthèses énergivores, est très peu étudiée. Il en va de même pour leur réactivité catalytique en ORR. Ici, la synthèse colloïdale bien connue d'oxysulfures de lanthanides à basse température (environ 300 °C), produisant par exemple Gd2O2S, est étendue à l’usage de précurseurs de molybdène. Nous avons étudié deux voies de synthèse basées sur celle des nanoplaquettes de Gd2O2S : par un protocole en deux étapes (ajout d'un précurseur de Mo à des nanoplaquettes de Gd2O2S fraîchement formées et non lavées) ou un autre en une étape (ajout simultané des deux précurseurs métalliques). L'analyse structurale a montré que la première méthode conduit possiblement à un dépôt de tétraèdres isolés de molybdate sur des nanoplaquettes de Gd2O2S sans changer leur forme et leur taille, tandis que la deuxième conduit plutôt à un environnement local de Mo plus sulfuré. En ORR, seuls les échantillons dopés au molybdate (à faible dose) ont montré des résultats positifs, qui sont directement liés à la présence de Mo. D'autres travaux exploratoires sur les synthèses sans Gd sont en cours pour compléter l'étude sur la structure et le mécanisme de formation des matériaux concernés. Dans l'ensemble, il s'agit de la première tentative d’application de la synthèse de l'oxysulfure de lanthanide pour synthétiser des oxysulfures de molybdène
Today, in personal vehicles, fuel cells are competing with the Li-ion batteries to provide the next technological leap. Hence, replacing noble metal by non-noble metal catalysts is essential to make them affordable. Molybdenum can be a good candidate as some compounds (e.g. MoS2, MoO2) are showing activity for the Oxygen Reduction Reaction (ORR). Uncommon molybdenum oxysulfides could be used as electrodes for Li-ion batteries or catalysts thanks to their porous structure in amorphous forms (thin films and bulk powders). Their colloidal synthesis at low temperature, favoring the nanoscaled materials and bypassing the simple energy-consuming synthesis, is barely reported. The same goes for their ORR catalytic reactivity, which was almost never studied. Here, the well-known colloidal synthesis of lanthanide oxysulfides at low temperature (around 300 °C), producing nanoparticles such as Gd2O2S, is extended to the use of Mo molecular precursors. We studied two pathways: by a two-step protocol (adding the Mo precursor to freshly formed, unwashed Gd2O2S nanoplates) or a one-step protocol (adding simultaneously both metallic precursors). The structural analysis showed that the first method possibly leads to a deposition of isolated molybdate tetrahedrons on Gd2O2S nanoplates without changing their shape and size, while the latter one leads to a more sulfide-like environment of Mo. As observed, only molybdate-doped samples (at low dose) showed positive results in terms of electrochemical activity, which is found related directly to the Mo’s presence. Other explorative work on the syntheses without Gd is being pursued to complement the study on the structure and the formation mechanism of the interested materials. Overall, this is the first attempt to synthesize molybdenum oxysulfide by applying the synthesis method of lanthanide oxysulfide
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Book chapters on the topic "Metal-containing nanoparticles"

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Berkovich, Inbal, Victoria Kobernik, Stefano Guidone, and Norberto Gabriel Lemcoff. "Metal Containing Single-Chain Nanoparticles." In Single-Chain Polymer Nanoparticles, 217–57. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527806386.ch6.

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Stalmashonak, Andrei, Gerhard Seifert, and Amin Abdolvand. "Optical Properties of Nanocomposites Containing Metal Nanoparticles." In SpringerBriefs in Physics, 5–15. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00437-2_2.

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Tanaka, Koichiro. "Ultrafast Spectroscopy of Glass Materials Containing Metal Nanoparticles." In Springer Series in Photonics, 401–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-58469-5_31.

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Corrias, Anna, and Maria Francesca Casula. "Aerogels Containing Metal, Alloy, and Oxide Nanoparticles Embedded into Dielectric Matrices." In Aerogels Handbook, 335–63. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-7589-8_16.

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Corrias, Anna, Danilo Loche, and Maria Francesca Casula. "Aerogels Containing Metal, Alloy, and Oxide Nanoparticles Embedded into Dielectric Matrices." In Springer Handbook of Aerogels, 809–33. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-27322-4_31.

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Slaveykova, Vera I. "Chapter 5. Phytoplankton Controls on the Transformations of Metal-containing Nanoparticles in an Aquatic Environment." In Chemistry in the Environment, 113–31. Cambridge: Royal Society of Chemistry, 2022. http://dx.doi.org/10.1039/9781839166570-00113.

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Falfushynska, Halina, Inna Sokolova, and Rostyslav Stoika. "Uptake, Biodistribution, and Mechanisms of Toxicity of Metal-Containing Nanoparticles in Aquatic Invertebrates and Vertebrates." In Biomedical Nanomaterials, 227–63. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-76235-3_9.

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Huang, Yunpeng, Shige Wang, Mingwu Shen, and Xiangyang Shi. "Hybrid Metal Nanoparticle-Containing Polymer Nanofibers for Environmental Applications." In Nanomaterials for Environmental Protection, 95–108. Hoboken, NJ: John Wiley & Sons, Inc, 2014. http://dx.doi.org/10.1002/9781118845530.ch6.

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Kumar, Sudheer, Sukhila Krishnan, Sushanta Kumar Samal, Smita Mohanty, and Sanjay Kumar Nayak. "Polymer Nanocomposites Coating for Anticorrosion Application." In Polymer Nanocomposites for Advanced Engineering and Military Applications, 254–94. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7838-3.ch009.

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Corrosion is the foremost reason for the deterioration of metallic components used in harsh environments and hence research on the development of an innovative protective system with admirable performance has become a subject of leading importance. Currently, chromates free organic or the polymer coatings on the metal substrate bestow an efficient barrier amongst the metal and inhibit corrosion and save the environment. Researchers have involved in the development of polymer coating containing nanoparticles because reinforcement of nanoparticles decreases the porosity and provides a zig-zag diffusion path which in turn forms barrier layer on the metal surface to protect the metal from the harmful corrosive species. This present chapter deliberates the application of polymer-based nanocomposite coating to mitigate the corrosion of metals against harsh environment. This chapter covers the utilization of carbon-based nanoparticles, inorganic nanoparticle, conductive polymer, self-heling polymer, etc., and could shows a new insight to for anti-corrosive metal surface protective coating.
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Kumar, Sudheer, Sukhila Krishnan, Sushanta Kumar Samal, Smita Mohanty, and Sanjay Kumar Nayak. "Polymer Nanocomposites Coating for Anticorrosion Application." In Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials, 1093–134. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-8591-7.ch045.

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Corrosion is the foremost reason for the deterioration of metallic components used in harsh environments and hence research on the development of an innovative protective system with admirable performance has become a subject of leading importance. Currently, chromates free organic or the polymer coatings on the metal substrate bestow an efficient barrier amongst the metal and inhibit corrosion and save the environment. Researchers have involved in the development of polymer coating containing nanoparticles because reinforcement of nanoparticles decreases the porosity and provides a zig-zag diffusion path which in turn forms barrier layer on the metal surface to protect the metal from the harmful corrosive species. This present chapter deliberates the application of polymer-based nanocomposite coating to mitigate the corrosion of metals against harsh environment. This chapter covers the utilization of carbon-based nanoparticles, inorganic nanoparticle, conductive polymer, self-heling polymer, etc., and could shows a new insight to for anti-corrosive metal surface protective coating.
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Conference papers on the topic "Metal-containing nanoparticles"

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Lee, Tae-Woo, Himanshu Tyagi, David Sonenschein, Patrick E. Phelan, Ravi Prasher, Robert Peck, and Paul Arentzen. "Ignition and Combustion Characteristics of Liquid Fuel Droplets Containing Metal Nanoparticles." In ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/ht2008-56466.

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Basic ignition, evaporation and combustion behavior of liquid fuel droplets containing metal nanoparticles is experimentally investigated. The addition of metal nanoparticles enhances the ignition and evaporation of the liquid fuel droplets, even at low volume fraction of the nanoparticles (0.1% to 0.5%). These enhancements were, however, independent of the amount, type and size of the nanoparticles and limited to ignition and low temperature evaporation conditions. At higher temperatures, evaporation and combustion rates of the liquid droplets were not significantly affected by addition of nanoparticles. The data suggest, therefore, that the primary role of nanoparticles is in enhancing the thermal diffusion during initiation phase (ignition and low-temperature evaporation) where even in very small amounts addition of nanoparticles increases the ignition probability and evaporation rates.
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Kudryashova, O., S. Vorozhtsov, Ya Dubkova, and M. Stepkina. "Mechanisms of acoustic processing of a metal melt containing nanoparticles." In ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016. Author(s), 2016. http://dx.doi.org/10.1063/1.4966416.

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Kudryashova, O. B., S. A. Vorozhtsov, M. Yu Stepkina, and A. P. Khrustalyov. "Ultrasonic impact on a metal melt containing electrostatically charged nanoparticles." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2017 (AMHS’17). Author(s), 2017. http://dx.doi.org/10.1063/1.5013793.

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Ito, Kyohei, Shuhei Inoue, and Yukihiko Matsumura. "Synthesis of Single-Walled Carbon Nanotube Containing Platinum Group Element." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44257.

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To prepare homogeneous nanoparticles is a key issue for catalytic reaction because it directly connects to the control of the reaction. Using the sidewall of SWCNT as a catalyst supporter, the size of nanoparticle can be controlled, because the particle size should be affected by the interaction between SWCNT and metal species and its curvature. In this study, we focused on the direct synthesis of SWCNT with highly dispersed platinum group metal species. As a result, adding an adequate amount of platinum group metals into catalysts never disturbs the synthesis of SWCNT. Referring to TGA measurement, the presence of metal attached and/or metal involved SWCNT is suggested. Furthermore, SEM images show many nanoparticles are on SWCNT. When ruthenium catalyst is used, ruthenium nanoparticles are observed on the surface of nano carbon materials, which looks like SWCNT. These results indicate the possibility of direct synthesis of metal-containing SWCNT in CVD technique.
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Duan, Xuan-Ming, Hong-Bo Sun, Koshiro Kaneko, and Satoshi Kawata. "Fabrication of polymeric 3D structure containing metal/metal oxide nanoparticles by two-photon processes." In Optical Science and Technology, SPIE's 48th Annual Meeting, edited by A. Todd Yeates, Kevin D. Belfield, Francois Kajzar, and Christopher M. Lawson. SPIE, 2003. http://dx.doi.org/10.1117/12.505406.

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Elouga Bom, L. B., J. Abdul-Hadi, and T. Ozaki. "High-order harmonics from targets containing an abundance of metal nanoparticles." In 2008 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2008. http://dx.doi.org/10.1109/cleo.2008.4551130.

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Augustine, Robin. "Electrospun polymer nanocomposite scaffolds containing metal oxide nanoparticles for diabetic wound healing." In Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2018. http://dx.doi.org/10.5339/qfarc.2018.hbpd1163.

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Khattab, Ahmed, Leopold Streletz, Kamy Thavanesan, Becky Jupp, Ibtisam Ali, Eluzai Hakim, Utpal Naghotra, et al. "Electrospun polymer nanocomposite scaffolds containing metal oxide nanoparticles for diabetic wound healing." In Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2018. http://dx.doi.org/10.5339/qfarc.2018.hbpd127.

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Rudenko, Valentyn, Anatolii Tolochko, Svitlana Bugaychuk, Dmytro Zhulai, Gertruda Klimusheva, Galina Yaremchuk, Tatyana Mirnaya, and Yuriy Garbovskiy. "Optical Nonlinearities of Unusual Liquid Crystal Glasses Containing Metal, Bimetallic, and Carbon Nanoparticles." In Frontiers in Optics. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/fio.2023.jm7a.21.

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This paper reports the synthesis and characterization of unconventional third-order nonlinear-optical materials with high figures of merit using glass-forming ionic liquid crystals and several types of nanomaterials including metal, bimetallic core-shell, and carbon nanoparticles.
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Laroque, Leonard, Abhishek Jain, Tie Wang, Karthik Chinnathambi, Ganapathiraman Ramanath, and Theodorian Borca Tasciuc. "Electrowetting of Nanofluids Containing Silver Nanoparticles." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68836.

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Application of voltage across a liquid-dielectric interface resulting in the change of fluid contact angle is known as electrowetting on dielectric (EWOD) effect [1]. EWOD actuation is one of the most preferred techniques to move liquid at microscale due to relatively low voltages, low currents and power consumption requirements, and the absence of electrolysis. Our recent work has shown that nanofluids containing semiconductor nanoparticles exhibit a very strong EWOD effect [2, 3]. In particular, in the tested voltage range of 0 to 60 V, nanofluids loaded with molecularly-capped bismuth telluride nanoparticles show enhanced stability and increased actuation range of contact angle change. Developing a fundamental understanding of the role of nanostructure inclusions in controlling and potentially enhancing the EWOD effect would pave the way for the efficient use of EWOD with nanofluids in a wide range or microfluidic applications. Here we extend the studies on the EWOD behavior of nanofluids, to a system containing noble metal nano particles. In this abstract we report the preliminary results of the electro-wetting studies on nanofluids containing silver nano particles.
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