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 33 for “"self-assembled monolayer (SAM)."”.
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Influence Of Applied Potential And Metal Ion Concentraion On Metal Electrodeposition At Micron Gap Gold Electrodes
… (metal/metal) or molecular (metal/polymer or self-assembled monolayer (SAM)/metal) junctions that should be useful in preparing working sensors and molecular electronic devices. The fabrication of metal/metal junctions involves metal deposition on one set of electrodes (E1), where the metal …
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Two-dimensional polymer synthesis : towards a two-dimensional replicating system for nanostructures
The general concept of a replicating monolayer system is introduced as a new method of nanostructure synthesis. One possible implementation of a 2-D replicating system is pursued which uses a diacetylene moiety for cross-linking and amide hydrogen bonding for molecular recognition between …
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Theory of molecular scale thermoelectricity
… designs will be effective when scaled up to a self-assembled monolayer (SAM) of molecules, we model three independent exper- iments on gold-SAM-graphene vertical transport devices. The agreement between our calculations and the experiments elucidates the survival of quantum interfer- ence …
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Thermal transport across interfaces with molecular layers
… oxide substrates such as quartz and sapphire. A self-assembled monolayer (SAM) of silane molecules is also grown on sapphire to make the third variety of molecular interfaces. The technique of transient absorption (TA) is used to probe the evolution of Au temperature following abrupt heating by …
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Light Coupling to Plasmonic Nanocavities
… to an area of contact between the NP and a Self-Assembled Monolayer (SAM), within a defined facet area. This enables strong Surface-Enhanced Raman Scattering (SERS) from the molecules at the facet. The energy deposited in the NP through laser irradiation was exploited to perform all-optical …
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Novel approaches to engineer glucose biosensors
… The biosensor design is based on thiomalic acid self-assembled monolayer (SAM) on which glucose oxidase was immobilised by a simple coupling technique together with a tetrathiafulvalene mediator entrapped in an epoxy-polyurethane permselective membrane. Functional testing revealed that such …
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Chemistry at liquid-liquid interfaces: con- and counter-current extraction and biologically active membranes in microchannels
… of microchannels with a photo-reactive self-assembled monolayer (SAM) allows for the stable photo-patterning of liquid-air interfaces within the microchannel. It is also found that these hydrophobic/hydrophilic interfaces allow for stable interfaces between immiscible fluids. Chemistry …
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Investigations into Protein-Surface Interactions via Atomic Force Microscopy and Surface Plasmon Resonance
… surfaces of graphite and mica as well as on self-assembled monolayer (SAM) via atomic force microscopy (AFM) to determine conformation. Complementary studies were performed via surface plasmon resonance (SPR) to investigate the dynamics of this adsorption process on gold, and an amine-, …
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Systematic Study of Parameters Affecting Unconventional Magnetism in Gold Nanostructures
… 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 dipole moment of the thiol is believed to affect the ease of charge redistribution from gold to the SAM. …
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Design and Optimization of Tunneling Nanoelectromechanical Switches
… to mitigate these issues is the integration of a self-assembled monolayer (SAM) to create tunneling NEM switches. Such switches could achieve nanometer-scale mechanical modulation of gaps between electrodes, showing the potential to overcome the limitations of a conventional NEM switch by …
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A study on possible interactions between biomolecules and nanoparticles
… the interactions of these modified Au NPs with self-assembled monolayer films on gold surfaces.Three types of self-assembled monolayer (SAM) modified gold surfaces were used in this study. The surfaces had SAMs that could be positively or negatively charged or carry no charge, or be able to …
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Detection of dementia (Alzheimer’s disease) marker tau using a four gold microband electrode impedance sensor
… microband electrodes covered with a layer of a self-assembled monolayer (SAM) and protein G. Specific antibodies were immobilized on the surface of the gold electrode by interacting with protein G. Electrochemical impedance spectroscopy (EIS), where the impedance is measured as a function of …
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Theoretical and experimental studies of energy transfer dynamics in collisions of atomic and molecular species with model organic surfaces
… CH<sub>3</sub>- and CF<sub>3</sub>-terminated self-assembled monolayer (SAM) surfaces. Complementary molecular-dynamics simulations were employed to gain an atomistic view of the collisions and elucidate mechanistic details not observable with our current experimental apparatus. We developed a …
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Molecular Self-assembly of Functionalized Pentacenes and Fullerenes on Metal Surfaces by STM and DFT Investigations
… bottleneck in organic photovoltaics. Molecular self-assembly on patterned substrates provides a bottom-up approach to create well-controlled molecular heterojunctions and a pathway to engineer the donor-acceptor interface at the molecular level. I present a study of the self-assembly of …
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Preparing Biological surfaces with well defined density and spatial distribution
… via covalent bonding (chemisorption) to create a self-assembled monolayer (SAM). This is spaced out by the steric bulk of the dendrons which is attached to the wheel component of the pseudorotaxane complex, that is hydrogen bonded to the axle. The pseudorotaxane complex will then disassemble by pH …
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Studies of Biomacromolecule Adsorption and Activity at Solid Surfaces by Surface Plasmon Resonance and Quartz Crystal Microbalance with Dissipation Monitoring
Self-assembly of polysaccharide derivatives at liquid/solid interfaces was studied by surface plasmon resonance spectroscopy (SPR) and quartz crystal microbalance with dissipation monitoring (QCM-D). Carboxymethyl cellulose (CMC) adsorption onto cellulose surfaces from aqueous solutions was …
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Selective metal ion-capturing by striped nanoparticles
… We manipulated gold nanoparticles protected by self-assembled monolayer (SAM) of mixed ligand molecules, which have shown noticeable characteristics. Thiolended molecules adsorb onto gold surface, resulting in the formation of SAM. Particularly, two dissimilar ligand molecules undergo a …
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Development of Patterned Self-Assembled Monolayers Toward the Study of Axonal Differentiation
… a two-dimensional starburst pattern. We utilize self-assembled monolayer: SAM) chemistry in conjunction with microcontact printing to create stable patterned substrates for cell culture. Photolithography is employed in the fabrication of patterned masters, which are used to create elastomeric …
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Sequence and structural effects on molecular conductance of bioinspired peptoid oligomers
… role of sequence and secondary structure on a self-assembled monolayer (SAM) of peptoids. This study specifically focuses on peptoid self-assembled monolayers (SAMs) as a model system that still preserves molecular-level information (sequence, side-chain identity, expected conformation) while …
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Interaction of emerging contaminants at the colloidal and planar interfaces : influence on environmental fate and transport
… –COOH and –NH2 with binding affinities on the same order of magnitude as colloidal NOM. This study reveals adsorption to –COOH and –NH2 functionalized particles is not limited to electrostatic interactions. The research in this thesis also include development and application of analytical …
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