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 118 for “"Self-assembled monolayer"”.
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Molecular adsorption at solid/liquid interfaces using self-assembled monolayer films
… such interactions at the molecular level, self-assembled monolayers (SAMs) have been employed as a model system as they offer the ability to produce well-defined organic surfaces of controlled composition. This thesis addresses the development and characterization of such films for …
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Nanocomposite of ZrO2/Polymer Thin-Film Coatings by the Ionically Self-Assembled Monolayer Technique
… silicon substrates by the Ionically Self-Assembled Monolayer (ISAM) technique. Particle size distribution was measured to calculate the grain diameter of the zirconia particles. UV/Vis spectroscopy and ellipsometry were used to characterize the ISAM technique. SEM and AFM were used to …
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Nonlinear Optically Active Ionically Self-Assembled Monolayer Thin Films of Organic Polymers Intercalated with an Inorganic Hectorite, Laponite RD
… chromophore, and a synthetic hectorite that self-assemble into the noncentrosymmetric structure required for second order nonlinear optical responses. UV/Vis spectroscopy and ellipsometry were used as probes to monitor film growth for upto 25 deposition cycles. Exceptionally homogeneous films …
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Interface Effects and Deposition Process of Ionically Self-Assembled Monolayer Films: In Situ and Ex Situ Second Hamonic Generation Measurements
… this thesis, detailed studies are presented into self-assembled, noncentrosymmetric, optically active films. Second harmonic generation (SHG) is used to measure the second order nonlinear optical susceptibility (?(2)) of ionically self-assembled monolayer (ISAM) thin films. Conventional ISAM films …
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Interfacial Reaction of an Olefin-Terminated Self-Assembled Monolayer Exposed to Nitrogen Dioxide: An Investigation Into the Reaction Rate and Mechanism
… mechanism when an unsaturated hydrocarbon monolayer at the gas-surface interface is exposed to gas phase nitrogen dioxide. An olefin-terminated thiol was synthesized and a self-assembled monolayer on Au(111) made and characterized using Reflection-Absorption Infrared Spectroscopy (RAIRS). …
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Self-assembled thin polymer film used for sensing application
… on polymer thin films including photopolymerized self-assembled monolayer and nanoporous thin films derived from diblock copolymer are discussed. In the first part of this thesis, a well-packed self-assembled monolayer with phosphonic acid as head group and diacetylenic functional group in the …
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Electrodeposition of Epitaxial Wide Bandgap P-Type Semiconductors and Copper Metal for Energy Conversion and Flexible Electronics
… semiconductors and epitaxial Cu thin films via a self-assembled monolayer for energy conversion and flexible electronics. Paper I introduces the epitaxial electrodeposition of hole conducting CuSCN nanorods onto Au (111) surface, and lift-off to produce flexible and transparent foils. Highly …
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Chemical and biological sensors based on organic semiconductors
… functionalization of device surface using self assembled monolayer techniques was employed for experiments that required specificity towards analyzed biological species.
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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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Development of Photochemical Surface Modification Technique
… research: I. Designing a photoactive monolayer with improved photo-grafting efficiency. II. Fabrication of NP-Films via phthalimide self-assembled monolayer on glass surfaces. Concluding the thesis, I will briefly describe an outreach research project in collaboration with my GK-12 …
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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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Advances in molecular scale electronics: Synthesis and testing of nanoscale wires and devices
… the use of phenylene ethynylene oligomers as self assembled monolayer negative tone resist for the manufacture of even smaller semiconductor chips. With current methods of silicon etching with polymer resists, devices with sub-25 run feature size are not obtainable. We have prepared the first …
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Sub-20nm substrate patterning using a self-assembled nanocrystal template
A hexagonally close-packed monolayer of lead selenide quantum dots is presented as a template for patterning with a tunable resolution from 2 to 20nm. Spin-casting and micro-contact printing are resolved as methods of forming and depositing these monolayers of quantum dots through self-assembly. …
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ESA based fiber optical humidity sensor
… goal of the study is to use the electrostatic self-assembled monolayer synthesis process to fabricate a Fabry-Parot Cavity based optical fiber humidity sensor. The sensing scheme bases on the refractive index change with relative humidity of the film applied to the end of optical fiber. That …
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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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Computational Investigations at the Gas-Surface Interface: Organic Surface Oxidation and Hydrolysis of Chemical Warfare Agents and Simulants
… of nitrate addition to a vinyl-terminated self-assembled monolayer. In the first system, we followed a reaction pathway beginning with primary ozonide formation through the formation of stable products. Theoretical vibrational spectra were used to identify a ketene product in prior …
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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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In-line Fiber Polarizer
… to the polished section of the fiber. Ionic self-assembled monolayer method was used to coat the polished fiber with thin film.
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Investigating the properties of molecular wires on gold and diamond
The self assembly and electron transport properties of various molecular films on different substrates were investigated in this thesis. In Chapter 3, we proved that the two-step strategy of coupling transition metal complexes to pyridine-terminated oligo(phenylene)ethynylene self-assembled …
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Using Electrochemical Method to Study the Interaction Between DNA and a compound Known to Have Anticancer Property.
… had been studied on a modified gold electrode by self-assembled monolayer using cyclic voltammetry. K<sub>4</sub>Fe (CN)<sub>6</sub> was used as a probe to obtain electrochemical information on the electrode surface.</p><p>A bare gold (Au) electrode was modified with cysteamine and our results …
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