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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 71 for “"self-assembled monolayers (SAMs)"”.
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Design of reversible "smart" surfaces for biomedical and nanotechnological applications
Chapter 1. An Introduction to Self-Assembled Monolayers & Surface Characterization A brief summary of the formation, structure, and characterization techniques of self assembled monolayers (SAMs) is described. The characterization techniques include contact angle goniometry, ellipsometry, …
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Fabrication of Chemically Modified Nanometer-sized Gold Electrodes and Their Application in Electrocatalysis at Pt Nanoparticles.
… surfaces. The electrodes were modified with Self-Assembled Monolayers (SAMs) of cysteamine and soaked in Pt colloid solutions overnight. Monitoring the decrements of the characteristic steady-state catalytic current for proton reduction indicated that aggregates of Pt nanoparticles are …
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SYNTHESIS OF PRECURSORS FOR MOLECULAR ELECTRONICS
… properties of fluorinated benzalkylsilane self-assembled monolayers (SAMs) of varying lengths and terminal groups. The rectification ratios were determined to be as high as ~200 and we also found that the rectification ratio correlates positively with the strength of the molecular dipole …
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Electrocatalytic CO2 Reduction by Self-Assembled Monolayers of Metal Porphyrins
… chemistry to azide-terminated alkyl phosphate self-assembled monolayers (SAMs) on ITO and FTO electrodes. The electrochemistry of these CO2 reduction systems is studied using cyclic voltammetry and chronoamperometry, and products are quantified through NMR and GC techniques. Additionally, AFM …
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Structural Characterization of Sulfur-Based Monomolecular Thin Films: I. Langmuir-Blodgett Films Derived From Multisulfur Heterocycles. II. Second Harmonic Generation Studies of Alkanethiolates on Ag and Au
… film/electrolyte systems have been studied. Self-assembled monolayers (SAMs) of alkanethiolates have been prepared on Ag and Au surfaces, both SHG and AC impedance measurements of the Ag-alkanethiolate-electrolyte systems have been performed for alkanethiols with different chain lengths. The …
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Controlling Self -Assembly of Anisotropic, Rod-Like Polypeptides on Solid Surfaces
Advances in engineering of interfaces using self-assembled monolayers (SAMs) have focused on molecules with increased function and design. With an aim to establish principles that guide the assembly of new materials on surfaces and develop relationships between the molecular organization of the …
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Functionalization of Surfaces Using Photolithography and Other Techniques
… two kinds of coatings, polymeric and self-assembled monolayers (SAMs). The polymeric coatings investigated are in the form of photoresists that are used to create substrates for laser ablation. Adjusting the composition of the photoresists leads to the formation of unique structures …
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Engineering Biosurfaces for Cell Studies
… and oligo(ethylene glycol) (OEG)-terminated self-assembled monolayers (SAMs) were studied as a function of the chain length of the OEG unit. In general, PEG with high molecular weight is better than short OEG SAMs in reducing protein and cell adhesion. In the second study, the effort to tune …
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Simultaneous templated assembly of different-sized nanocomponents by selective removal
… shapes complementary to the components to be assembled, and then using adhesion and fluid flow to selectively keep the components in certain locations on the substrate and remove them from all other locations. Adhesion is induced by growing self assembled monolayers (SAMs) on the components …
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Energy Transfer Dynamics in Collisions of Polar and Non-polar Gases with Functionalized Self-Assembled Monolayers
… with long chain CH3, NH2, and OH terminated self-assembled monolayers (SAMs) on gold. Surface rigidity, internal degrees of freedom of the impinging gas, and potential energy surface well depths have been explored as a way to predict the outcome of a gas-surface collision. Ne is used to …
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Switchable biological surfaces
… wettability and bio-molecule immobilisation onto self-assembled monolayers (SAMs) has many potential biological and medical applications. The aim of this project was to produce mixed biotinylated peptide monolayers that are responsive to an electric potential, thus providing a system in which the …
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Orientation and Dynamics of Nanoscale Liquid Crystalline Films
… printing (muCP)) by the adsorption of Self Assembled Monolayers (SAMs) of thiols and functionalized thiols. This is of particular interest for future studies of molecularly tailored surfaces for directing the orientation of liquid crystalline thin films.
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Self-Assembled Monolayers of N-Heterocyclic Carbenes on Gold and Silver: Applications in Biosensing
… of metallic surfaces using thiol-based self-assembled monolayers (SAMs) has been explored in the literature in the past three decades; silver surfaces less explored than gold. This technology has promise in many surface-based applications, specifically in micro electronics, sensors that …
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Adsorption of Xyloglucan onto Cellulose and Cellulase onto Self-assembled Monolayers
… on the adsorption of cellulase onto alkane thiol self-assembled monolayers (SAMs) on gold was also studied. Methyl (-CH3), hydroxyl (-OH) and carboxyl (-COOH) terminated SAMs were prepared. Adsorption of cellulase onto untreated and Tween 80-treated SAMs were monitored by SPR, QCM-D and AFM. The …
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High pressure surface enhanced Raman scattering spectroscopy
… diamond anvil cell technique to study molecular monolayers and single molecules under high pressure. Vibrational spectra up to 8 GPa were obtained for self-assembled monolayers (SAMs) of the energetic material simulant 4-nitrobenzenethiol (NBT). A large pressure-broadening NO2 symmetrical stretch …
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Lithograph regulation of cellular mechanical properties c by Tsu-Te Judith Su.
… substrates. Microcontact printing of self-assembled monolayers (SAMs) of alkanethiolates on gold was used to create a planar substrate of islands surrounded by non-adhesive regions. The cells were physically constrained within nanometer high adhesive cylindrical posts of defined size …
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DEVELOPMENT OF SURFACE BASED PLATFORMS FOR BIOMOLECULAR RECOGNITION AND PROTEASE ASSAYS
… of characterized platforms: microspheres and self-assembled monolayers (SAMs) on flat surfaces. The surface preparation and conjugation process with biological components of interest is presented along with surface plasmon resonance (SPR) and flow cytometry results. These platforms were …
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Utilization of nanostructured surfaces for sensing applications and the use of nanoentities for the fabrication of new materials
… modification of Si\(_3\)N\(_4\) substrates with self-assembled monolayers (SAMs) of 3-aminopropyltrimethoxysilane (APTMS) via a vapour deposition method. This investigation was carried out by forming APTMS SAMs, from the solution phase, on both SiO\(_2\) and Si\(_3\)N\(_4\) substrates and …
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Additive Fabrication and Soft -Lithographic Patterning of Microelectronic Devices
… 2 describes how microcontact printing of organic self-assembled monolayers (SAMs) can be used to induce selective chemical vapor deposition (CVD) of platinum and palladium metal films on silicon, which are used extensively in the microelectronics industry to make metal silicide interconnects. The …
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