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 15 of 15 for “"octadecyltrichlorosilane"”.
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Hydrate formation and adhesion on low surface energy materials
… negligible hydrate formation and adhesion on octadecyltrichlorosilane-coated surfaces via macroscopic visualization, surface tilt and adhesion measurements. The use of the spreading coefficient as a design parameter could further advance the development of effective, passive, hydrate-repelling …
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Preparation And Characterization Of Self-Assembled Monolayers And Mesoscale Protein Patterning
… was used to develop self-assembled monolayers of octadecyltrichlorosilane (OTS) and undecenyltrichlorosilane(UTS) on Si(100) wafer. Undecenyltrichlorosilane monolayer was oxidized at the vinyl terminal to generate a carboxylic acid group. Lysozyme protein was immobilized on the polar carboxylic …
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Fabrication and characterization of nano-engineered membranes for oil-water separation
… emulsions. A polycarbonate membrane treated with octadecyltrichlorosilane (OTS) is used to filter a 3 wt% w/o emulsion. The permeate is characterized to have no measurable water content by microscopy, dynamic light scattering (DLS) and differential scanning calorimetry (DSC). To extend this work, …
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Modeling bubble-particle interactions in flotation using hydrophobic solid surfaces
… 0 to 109° were prepared by reacting silica with octadecyltrichlorosilane (OTS). Contact angles, AFM images, and infrared transmission spectra showed that OTS forms clusters on the silica surface. The presence of water in the reaction was shown to greatly influence the formation of these clusters. …
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Force and Energy Measurement of Bubble-Particle Detachment
… bromide coated silica sphere from a flat bubble. Octadecyltrichlorosilane was used as a hydrophobic coating in the first two experimental methods. These experiments were recorded with a CCD camera to identify the detachment processes involved. Energies for both methods were calculated and divided …
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Biodiesel Production and Purification with a Hydrophobic Sintered Glass Filter
Octadecyltrichlorosilane (OTS) has been chemically grafted onto sintered glass filters to render them hydrophobic. These hydrophobic filters were subsequently employed for the purification of biodiesel. Various properties of the OTS-coated sintered glass filters were evaluated, such as the water …
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Vibrational Spectroscopy and Atomic Force Microscopy Studies of Silane Adsorption onto Silicon and Glass.
The adsorption of two surfactants, n-octadecyltrichlorosilane and perfluorodecyl(ethyl)trichlorosilane, onto silica surfaces, was investigated by Fourier transform infrared attenuated total reflection, (FTIR-ATR), spectroscopy and by atomic force microscopy, (AFM). The rate of formation of the …
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Modulation of cell morphology and function using synthetic biodegradable polymers
… with a diameter of 10 or 50 mum surrounded by octadecyltrichlorosilane self-assembled monolayers. The micropatterned surfaces were shown to affect initial RPE cell attachment and spreading, and modulate the expression of differentiated cell phenotype. A novel biodegradable polymer substrate was …
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Molecular-Level Investigations Combining Nanoscale Lithography and Atomic Force Microscopy
In this dissertation, nanostructures of octadecyltrichlorosilane (OTS) and were prepared using particle lithography and evaluated using characterizations with atomic force microscopy (AFM). The nanostructures of OTS were used as a resist for patterning fibronectin, an extracellular matrix protein. …
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Measurement and Control of Slip-Flow Boundary Conditions at Solid-Gas Interfaces
… argon, carbon dioxide, hexafluoride sulfur) on octadecyltrichlorosilane-coated glass surfaces. A lower TMAC occurred for greater molar mass, and this trend was explained using a simple model representing both the gas and the monolayer by spheres. The existence of this gas-dependent difference in …
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Studies of Thin Liquid Films Confined between Hydrophobic Surfaces
… plate were treated by both chemisorption of octadecyltrichlorosilane (OTS) and physical adsorption of octadecyltrimethylammonium chloride (C18TACl). A thermodynamic analysis of the results show similar results for both of the samples, that both ""Sf and excess film enthalpy ("Hf) become more …
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Self-Assembled Host-Guest Thin Films for Functional Interfaces
… into a solution containing an active surfactant. Octadecyltrichlorosilane (OTS) was used initially as a molecule to study the self-assembled monolayer procedure. To study a "host-guest" self-assembled monolayer system, a compound is being synthesized from 9-bromoanthracene. This compound would …
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Hydrophobic Forces in Flotation
… flotation. The glass sphere was hydrophobized by octadecyltrichlorosilane so that its water contact angle was 109 degrees. The mineral systems studied include covellite (CuS), sphalerite (ZnS) and hornblende (Ca₂(Mg, Fe)₅(Si₈O₂₂)(OH,F)₂). The collector used for all the mineral systems studied was …
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Design and fabrication of asymmetric nanopores using pulsed PECVD
… the kinetics and thermodynamics of the octadecyltrichlorosilane (OTS) attachment was investigated in-depth as an approach to convert hydrophilic metal oxides into hydrophobic surfaces. It was shown that a simple ozone treatment was a satisfactory alternative to hazardous acids to create …
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Molecular adsorption at solid/liquid interfaces using self-assembled monolayer films
… and that are better than for films prepared from octadecyltrichlorosilane. These oligo(ethylene glycol)-siloxane coatings offer performance advantages and could easily provide a direct and superior replacement for protocols that presently use silane reagents to generate hydrophobic, "inert" …