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Showing 1 to 12 of 12 for “"nanoporous gold"”.
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Nanoporous Gold: Mechanics of Fabrication and Actuation
This thesis investigates fabrication methods for Nanoporous Gold (NPG), the complex nature of the film stress evolution in thin films during their fabrication and during surface charging. Fabrication of microstructures comprised of NPG requires a precise control over selective corrosion of the …
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Topological characterization of nanoporous gold during coarsening
Previous studies of nanoporous gold have found that, during the coarsening process, the genus per characteristic volume of nanoporous gold has remained constant. Using a rolling-ball type algorithm, in which a test probe rolls over the surface to identify atoms, several test structures and a …
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Morphology Tuning and Mechanical Properties of Nanoporous Gold
Nanoporous gold is an exciting topic that has been highly researched due to its potential in applications including sensing, catalysts, gas storage, and heat exchangers, made possible by its high surface area to volume ratio and high porosity. However, these applications tend to require a specific …
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Dynamically tunable nanoporous gold for ionic and molecular separations
The student, Daniel McCurry, accepted the attached license on 2016-08-28 at 19:29.
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Investigating the origin of localized plastic deformation in nanoporous gold by in situ electron microscopy and automatic structure quantification
Gold gains many useful properties when it is formed into a nanoporous structure, but it also becomes macroscopically brittle due to flow localization and may therefore be unreliable for many applications. The goal of this work was to establish processing/structure/property relationships of …
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Systematic Study of Parameters Affecting Unconventional Magnetism in Gold Nanostructures
… and interpretations of the novel magnetism of gold, by isolating two variables for testing. They are molecular dipole moment of the thiol that forms a self-assembled monolayer (SAM) on gold nanoparticles and thin-films, and roughness of gold thin-films. The first variable is chosen because the …
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Novel infrared spectroscopic techniques for the study of adsorbed proteins on photoactive thin films
… techniques, as well as biocompatible nanoporous gold film confining layers and photoactive nanocrystal cadmium telluride (CdTe) thin films, a system capable of in situ study of adsorbed protein films on photoactive layers was created. Due to the oxygen intolerance of the enzyme of …
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Computational Studies of the Mechanical Response of Nano-Structured Materials
… Strain localization and yield response on nanoporous gold lattices as a function of their solid volume fraction are investigated in axially strained periodic samples with constant average ligament diameter. Simulation stress results revealed that yield response was significantly lower than …
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Electrochemical sensors for integration on silicon
… arrays are subsequently modified with nanoporous gold resulting in an increase in current for the detection of lead by 1.5-fold. These modified interdigitated electrodes successfully detected lead in 0.1 M acetate buffer pH 4.6 with a limit of detection of 0.43 ppb. However, issues …
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Micromechanical modelling of advanced hierarchical composites
Nanoporous metals are uniquely interesting materials. Their high ductility and impressive strength in compression make them a favourable candidate for use in structural applications. However, these materials under-perform when tested in tension. This issue may be addressed by impregnating the …
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Electrochemical biosensor based on microfabricated electrode arrays for life sciences applications
… of silicon-based and glass-based gold microelectrode arrays with various geometries (band and disc) and dimension (ranging from 10 μm-100 nm) were reported. It was found that silicon-based transducers of 10 μm gold microelectrode array exhibited the most stable and reproducible …
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EFFECTS OF SIZE AND COMPOSITION ON THE PERFORMANCE OF DEALLOYED NANOPOROUS METAL CATALYSTS FOR CO2 REDUCTION, O2 EVOLUTION, AND H2 GENERATION
… on one specific type of material systems, namely nanoporous metals which find wide applications in energy conversion and storage, and study their structure-performance relations towards various catalytic reactions including CO2 reduction, O2 evolution and H2 generation. In doing so, I aim to …