Global ETD Search
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 40 for “"Silver nanoparticle"”.
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Adhesion of silver nanoparticle amendments to ceramic water filters
Silver nanoparticles (Ag NPs) are frequently added as a disinfectant to ceramic filters used for household drinking water treatment. To provide suspension phase particle stability, Ag NPs can be synthesized using a number of different molecules to cap the metal core. The goal of this doctoral work …
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Controlled Evaluation of Silver Nanoparticle Dissolution Using Atomic Force Microscopy
Incorporation of silver nanoparticles (AgNPs) into an increasing number of consumer products has led to concern over the potential ecological impacts of their unintended release to the environment. Dissolution is an important environmental transformation that affects the form and concentration of …
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Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
<p>The antimicrobial properties of silver have been taken advantage of by societies for thousands of years. Its use has come back in favor in the form of silver nanoparticles, which are highly efficacious antimicrobial agents. Silver nanoparticles are incorporated into a myriad of products …
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Controlled Evaluation of Silver Nanoparticle Dissolution: Surface Coating, Size and Temperature Effects
… and evaluated in many published studies. Silver nanoparticles (AgNPs) represent one of the most widely manufactured nanomaterials. They are currently being incorporated into a wide range of consumer products due to their purported antimicrobial properties. However, either the AgNPs …
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Selection and Evaluation of a Silver Nanoparticle Imaging Agent for Dual-Energy Mammography
… anatomical images. Upon consideration, silver was chosen for more detailed study. Through simulation and experimental validation, we determined that not only does silver perform better than iodine when imaged at their respective optimal conditions, but silver is able to provide higher …
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Characterization and control of the nonlinear optical properties of dendritic silver nanoparticle clusters
… of the energy transport in thin films of silver nanoparticles on dielectric surfaces are explored. Specifically, this dissertation will present experiments in which an ultrafast laser (~ 13 fs) centered at 800 nm is focused at normal incidence on a thin film of polydisperse silver …
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Optimization and application of a SERS-active silver nanoparticle overlayer on a polymer surface
Includes bibliographical references (pages 82-86).
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Evaluation of silver nanoparticle-fortified biochar as a reactive filter media for irrigation water disinfection
… water using a novel water treatment media, silver-amended soil reef biochar (Ag/SRB). Biochar is produced from pyrolyzed organic waste and has been used in water treatment applications for chemical removal and transformation. Through addition of silver, Ag/SRB can significantly reduce …
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ESTABLISHING PTERIDINE METABOLISM IN A BREAST CANCER CELL MODEL AND QUANTIFICATION OF SILVER NANOPARTICLE INTERACTIONS WITH YEAST CELLS USING MASS SPECTROMETRY
… analyses, with applications in cancer and nanoparticle research. In the first part of the research presented, a recently developed HPLC-MS/MS method was advanced to elucidate pteridine metabolism in an isogenic progressive MCF10A breast cancer cell model. The folate-derived pteridine …
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Nanoparticle sensors for the detection of DNA related to disease
… to develop stable dye-labelled oligonucleotidenanoparticle conjugates for the detection of DNA related to disease using surface enhanced resonance Raman scattering (SERRS) spectroscopy. In order to achieve this, both gold and silver nanoparticle conjugates were successfully functionalised with …
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Mechanical property characterization of metal nano-particle films for MEMS devices
… of microns. In the micron-thickness regime, nanoparticle-based inks are the preferred means for material delivery, in large part due to the ability to deliver high solids content. However, sintered nanoparticle films possess unique morphology and hence different properties when compared to …
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Inorganic Nanoparticle Nucleation on Polymer Matrices
The introduction of inorganic nanoparticles into organic materials enhances both the mechanical and chemical properties of the material. Metallic nanoparticles, like silver and gold, have been introduced into polymers for use as antimicrobial coatings or dielectric materials, respectively. The …
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A dressing solution for burn wounds: antibacterial and low-adherent wound dressings
… low-adherent wound dressings is urgently needed. Silver ion is a widely used antimicrobial agent, but its cytotoxicity remains a problem. In this study, low-adherent PAM (polyacrylamide) hydrogel incorporated with less toxic AgNP (silver nanoparticle), was immobilized onto PET (poly(ethylene …
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Manufacturing Strain Sensor Via Printed Electronics Onto 3D Printed Substrates
… extrusion printing, and inkjet printing. We used silver nanoparticle ink and studied different conditions to maximize electrical conductivity of the ink. This optimization includes ultraviolet (UV) time exposure, drop spacing, heating conditions, intense pulsed light parameters, and length …
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Fundamental studies of polyelectrolyte multilayer films : optical, mechanical, and lithographic property control
… periodic fashion, were constructed by confining silver nanoparticle growth to layers of nanometer-scale thickness. The ability to construct such structures is shown to be dependent on the ability to precisely control the concentration of metal-binding carboxylic acid groups throughout the depth …
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Novel Integration of Conductive-Ink Circuitry with a Paper-Based Microfluidic Battery as an All-Printed Sensing Platform
… study, a microfluidic battery was mated with silver-nanoparticle conductive ink to prototype an all-printed sensing platform. A multi-layer, two-cell device was fabricated, generating 200 μA of direct electrical current at 2.5 V sustained for 16 minutes with a power loss of less than 0.1% …
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Improvements to the electrohydrodynamic jet printing process
… manufacturing. First, an investigation into new silver nanoparticle inks for use in electronics printing yielded 4-20 µm lines with resistivities around ten times that of bulk silver. The printed performance is demonstrated to be promising for microscale additive manufacturing. Specific obstacles …
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Surface engineering using layer-by-layer assembly of pH-sensitive polymers and nanoparticles
… assembly of pH-sensitive polymers and nanoparticles. In the first part of this thesis, hydrogen-bonded multilayer coatings comprising poly(acrylic acid) and polyacrylamide were used to functionalize spherical colloidal particles. Multilayer-modified colloids showed an excellent …
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NANOPARTICLE BASED MULTI-MODAL THERAPIES AGAINST TRIPLE-NEGATIVE BREAST CANCER
… commonly targeted by hormone or immunotherapies. Silver nanoparticles (AgNPs) have exhibited a selective toxicity against TNBC cell lines at concentrations that are not lethal to non-tumorigenic cells, which makes them a candidate for the development of a multimodal cancer therapy that uses a …
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