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 13 of 13 for “"Flat gold"”.
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Novel Methods for the Control and Detection of Protein Interactions on Surfaces
… to provide a means for polymer attachment to gold surfaces. Additionally, a low molecular weight poly-ethylene glycol ligand is used to enhance the films resistance to protein adsorption. The resulting grafted polymers spontaneously form highly stable thin films on both gold nanoparticles as …
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A Microfabricated Bioimpedance Sensor with Enhanced Sensitivity for Early Breast Cancer Detection
… accomplish this, a bioimpedance sensor with flat gold microelectrodes on a silicon substrate was designed and fabricated. Suberoylanilide hydroxamic acid (SAHA), an FDA-approved anti-cancer agent was used to improve the sensitivity of the bioimpedance sensor towards cancer cells by …
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Atomic Force Microscope Conductivity Measurements of Single Ferritin Molecules
… bacterial ferritin (AvBF) molecules deposited on flat gold surfaces. A 500 micron diameter gold ball was also used as a contact probe to measure the conductivity of a thin film of ferritin molecules. The average current measured for holo HoSF was 13 and 5 times larger than that measured for apo …
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Curvature driven phase separation in mixed ligand coated gold nanoparticles
Monolayer-coated gold nanoparticles have been the subject of extensive studies in fields ranging from physics to medicine. The properties of these nanomaterials such as solubility and surface energy are often attributed solely to the chemical functionalities of the ligand head-groups. However, the …
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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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Molecular assemblies observed by atomic force microscopy
… the proteins must be adsorbed to atomically flat mica and densely packed in a membrane to restrict their lateral mobility. Atomically flat gold, engineered proteins, and chemically modified lipids were combined to rapidly assemble immobile and fully oriented samples. The resulting AFM …
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Plasmonic Nanoshells: Synthesis, Functionalization, and Photonic Applications
… the functionalization and application of hollow gold-silver nanoshells (GS-NSs). GS-NSs were chosen for this research because of their unique surface plasmon resonance properties, allowing for these nanostructures to be designed to absorb light at wavelengths from the visible to the …
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Coupling electrolysis and surface patterning to improve onset of nucleate boiling and bubble departure in pool boiling heat transfer
… evolution reaction, HER) and engineering gold thin-strip microstructures fabricated on silicon substrates. The central hypothesis is that electrochemically generated hydrogen bubbles near the heating surface can significantly increase nucleation site density at low superheat, while …
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An investigation into the aggregation of therapeutic peptides through adsorption to primary containers
… roughness were created through addition of gold nanoparticles, and using the QCM-D, adsorption was compared to that of flat gold surfaces. An increase of adsorption on flat surfaces compared to rougher surfaces was found, indicating a more intricate relationship than previously thought. E- …
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Plasmonic Sensing via Surface-Enhanced Spectroscopies
… formed in the nanometric gaps between gold nanoparticles. Sub-wavelength sized nanoparticles irradiated with light support electron oscillations known as plasmons, and coupling of plasmons between adjacent nanoparticles leads to hot-spots of high field enhancements in the gaps between …
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Characterisation of electrode microarrays produced photolithographically and with thiol self-assembled monolayers on gold electrodes
… Electronics, Durham University) assembled on flat gold electrodes are evaluated using Marcus model of electron-transfer and tunnelling theory. The behaviour of these wires is compared with heptanethiol and dodecanethiol SAMs. A preliminary study for application of self-assembled monolayer of …
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Polysaccharide-based nanostructures for growth factor delivery and mesenchymal stem cell activation
… (PEMs) and electrospun nanofibers. On flat gold-coated glass surfaces, PEMs were constructed using the polycations chitosan and N,N,N -trimethyl chitosan, and the polyanions hyaluronan, chondroitin sulfate, and heparin. An exhaustive spectroscopic study was performed on all of the PEMs …
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Interactions between molecules and nanostructures using quartz crystal microbalance
… novel methods of nanofabrication on top of QCM gold electrodes were created using ZnO nanowires (Chapter 1), gold nanoparticles (Chapter 2), and e-beam lithography (Chapter 5). These techniques were further optimised to obtain simple protocols to be followed by any user. Subsequently, optimal …