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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Ag nanoparticles"”.
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Experiment-Based Quantitative Modeling for the Antibacterial Activity of Silver Nanoparticles
<p>Silver (Ag) has been well known for its antimicrobial activity for a long time. Recent research showed the potential of Ag nanoparticles as emerging antimicrobial agents. However, little quantitative analysis has been performed so far to decipher the mechanism of interaction between …
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Silver (Ag) nanoparticle based masks for the development of antireflection subwavelength structures in GaAs and Si solar cells
… focuses on the design and development of silver nanoparticles that can be used as masks for the development of antireflection subwavelength grating (SWG) structures. We particularly investigate the impact of silver thin film thickness and the effect of annealing temperature on the fabrication of …
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Novel Nanostructured Titania and Titania Nanocomposites for Photovoltaics and Photocatalysis
… of DSSCs. For example, uniformly-sized Ag nanoparticles are deposited onto TiO2 nanotube array via pulse electrodeposition for plasmon effect, leading to enhanced light absorption in DSSCs. Also, reduced graphene oxide nanosheets are deposited onto a TiO2 nanotube array using …
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Chemiluminescent reactions catalyzed by nanoparticles of gold, silver, and gold/silver alloys
… (CL) reactions are catalyzed by metals nanoparticles, which display unique catalytic properties due to an increased surface area. The present study describes the catalytic effects of nanoparticles (NP) of silver, gold, and alloys of Au/Ag nanoparticles on the chemiluminescent reaction …
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Design and Synthesis of Nanomaterials for Surface-Enhanced Raman Scattering, Fuel Cell Technology, and Photonics
… trapped within the hot-spot region in individual Ag nanoparticle dimers. Then, I performed a systematic investigation on the SERS activity of individual dimers composed of two closed spaced Ag nanoparticles. By utilizing Ag nanoparticles displaying a variety of well-defined shapes, sizes and …
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Optical Properties of Substrate Supported Mixtures of Silver and Gold Nanoparticles
… of the spectrum. Herein, mixtures of Au and Ag nanoparticles (NPs) were combined to achieve new nanoarchitectures with useful electromagnetic properties. It was predicted that these mixtures would produce materials with multiple plasmon modes providing opportunity for greater manipulation of …
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Fabrication, characterisation, and analysis of plasmonic noble metal nanostructures
… dielectric, and thus plasmonic, properties of Ag nanoparticles were investigated through boundary element simulations. It was found that the three most cited compounds of Ag corrosion in the literature, Ag2O, AgCl, and Ag2S, have very different effects on the plasmonic response of Ag …
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Hybride von Metall-Nanopartikeln mit hochverzweigten Polyethylenimin als lösliche, abtrennbare Katalysatoren
… a key challenge. Thermodynamically favored aggregation is usually suppressed by adsorption of low-molecular weight surfactants or linear polymers on the nanoparticle surface. Recently, motivated by the challenge of efficient nanoparticle stabilization and the concept of particle size control …
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SYNTHESIS OF EFFICIENT PHOTOCATALYSTS IN EXTREME TEMPERATURE CONDITIONS FOR THE DEGRADATION OF AIR POLLUTANTS.
… methods with the calcination step as the final stage, such as sol-gel, solid-state, and sonochemical (in ascending order of sustainability), emerged as the most eco-friendly approaches for STO fabrication. These insights provided valuable guidance for the continued development of sustainable, …
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Fabrications and Applications of Protein-based Bionanocomposites
Stabilization of highly sensitive noble metal nanoparticles is essential for their practical application. Bionanocomposites in which various types of noble metal nanoparticles, especially anisotropic noble metal nanoparticles, are immobilized into a macroscopic biomaterial membrane show promising …
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The Use of Spectral Imaging to Reveal Inorganics and Organics Identity in The Biological Samples
… the number of molecules in the spectral imaging system. It aids in identifying materials and studying their quantities by examining how they interact with light. A traditional spectrometer provides spectrum information of chemical compounds, while standard imaging provides the intensity at …
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Polyelectrolyte multilayers as nanostructured templates for inorganic synthesis
… application in optoelectronics and photonics, magnetic media, and batteries and fuel cells. In addition to the component material properties, the properties and performance of the nanocomposite depend crucially on the interaction between and the nanoscale organization of the components. The …
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Antibacterial activities of silver-nanoparticles-titania composite thin films fabricated by the molecular precursor method (MPM)
… properties. The antibacterial property of silver-nanoparticles-doped TiO2 photocatalysts (Ag-NPs/TiO2) could be further enhanced by visible light illumination, which also widens its practical applications. However, the major limitation of this Ag-NPs/TiO2 composite material is its poor …
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Magneto-transport properties of manganite/secondary phase inhomogeneous systems
… by introducing secondary phases into a ferromagnetic manganite forming an inhomogeneous manganite/secondary phase system. TiO2 insulator was introduced as a secondary phase into the ferromagnetic La0.7Ba0.3MnO3 (LBMO) manganite with ratios (x=0.02, x=0.04, x=0.06 and x=0.08) forming the …
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Development of novel metal nanoparticle based methods for detection of bacteria using surface-enhanced Raman spectroscopy
… dissociation of adsorbed DMDS on the surface of Ag and Au nanoparticles. A variety of enhancing substrates were used, the first were arrays of Ag and Au nanoparticles which were deposited on a glass substrate from a layer of nanoparticles trapped at a liquid/liquid interface (a so-called …
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Graphene Decorated Substrates and Their Interfacial Characteristics
… for surface enhanced Raman spectroscopy (using Ag nanoparticles) and electrochemical sensing (using Pt nanoparticles). Finally, it is shown that few-layer graphene films on Cu serve as oxidation barrier under ambient, high temperature and under extreme conditions such as that of flow boiling</p>
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Crumpled Graphene Oxide: Aerosol Synthesis and Environmental Applications
… process is needed to produce monomeric and aggregation-resistant GO nanostructures/composites, in addition to new knowledge of material properties, behavior, and performance within an environmental context.</p> <p>Research presented in this thesis addresses both scientific and engineering …
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Targeted preparation of metallic materials via innovative electrochemical approaches
… Zn) containing ppm or lower concentrations of Ag and/or Cu has been investigated using a novel electrochemical method based on combined electrodeposition and redox replacement (EDRR). EDRR experiments were initially performed in two-component solutions (containing Zn-Ag and Zn-Cu), after which …
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Optical properties of metal nanoparticles and their influence on silicon solar cells
The optical properties of metal nanoparticles have been investigated by simulation and experimental techniques. The aim of this investigation was to identify how to use metal nanoparticles to improve light-trapping in silicon solar cells. To do this we require nanoparticles that exhibit a high …
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Intelligent Nano/Microgels for Cell Scaffold and Drug Delivery System
… as change in pH, temperature, ionic strength or magnetic fields. Therefore, they become ideal candidates for biomaterial applications. For this work, we focus on the several intelligent microgels and their application on two areas: the cell scaffold and the drug delivery system. </p> <p>As for the …
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