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Showing 1 to 15 of 15 for “"organosilanes"”.
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Application of organosilanes in [3 + 2] annulation approaches to carbocyclic compounds
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Self-Assembled Thin Films: Peptides in Hybrid Bilayers and Mixed Organosilanes on Silica
North Carolina State University Theses Chemical Engineering.
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Molecular Crosslinking of Calcium-Silicate-Hydrate with Organosilanes: Toward Engineering of Cementitious Matrices with High Thermal Resistance
… cement hydration, are directly bridged with bis-organosilanes molecules. The crosslinking with organic molecules provides C-S-H with attributes imperative for the reduced thermal conductivity e.g. contrast in vibrational densities of states and reduced particle density, which can positively alter …
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Molecular-Level Investigations Combining Nanoscale Lithography and Atomic Force Microscopy
… of latex or silica are dried on a flat surface. Organosilanes attach to surfaces by successive steps of hydrolysis and condensation. Nanoscopic amounts of water are required to initiate the hydrolysis step of the reaction, if too much water is present the molecules cross-link to form polymer …
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ATR-FTIR spectroscopy and Raman microscopy studies of organosilane diffusion and hydrolysis in PVC films.
Organosilanes are widely used to bond organic materials such as polymers to inorganic materials in polymer composites. However, the mechanism of adhesion is poorly understood. One postulated mechanism is the interdiffusion of the silane and polymer, along with condensation of the silane to form an …
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Lewis Base Catalyzed Aldol Additions of Chiral Silyl Enol Ethers and Total Synthesis of Rk-397
… palldium-catalyzed cross-coupling reactions of organosilanes.
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Synthesis and Characterization of Mixed-Metal Phosphonates For Polymer Dielectric Composite Materials
… surface modifications have been achieved via organosilanes. While an excellent approach for preparing surface-modified oxides, hetero-condensation between the organosilane coupling molecule and the oxide leads to the formation of Si-O-M bonds, while homocondensation between two coupling …
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Síntese e caracterização de materiais mesoporosos inorgânico-orgânicos para aplicação na adsorção de gás carbônico
… character; and graft functionalization with organosilanes, where we used the N [(3-trimetoxissilil) propyl] diethylenetriamine (DT- NNN) where the structure is formed from a group of silicon and three amines. The reaction of this molecule with the silicon surface is performed through a …
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Surface studies of organic thin films using scanning probe microscopy and nanofabrication
… Nanopatterned SAMs of alkanethiols and organosilanes were used successfully to direct the nanocrystals of porphyrins on the surface and characterized with contact and tapping mode imaging of AFM. Our goals were to elucidate the role of molecular structure, packing and orientation for the …
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Synthesis and evaluation of quadruple hydrogen-bonding modules for smart materials applications
… and functionalization of glass substrates with organosilanes are reported. Materials characterization and mechanical test results are consistent with the recognition units playing a role in the improved adhesive response as compared to an unmodified system. Progress toward a photoresponsive …
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Thermodynamic and transport properties of self-assembled monolayers from molecular simulations
… 5 nm pore size, modified via chemical bonding of organosilanes with a range of sizes (C4, C8 and C18) is presented. Grand canonical MC simulations are employed to obtain nitrogen adsorption isotherms for unmodified and modified MCM-41 material models. Furthermore, the density profiles of alkyl …
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Fabrication of nanostructured surfaces with well-defined chemistry using particle lithography
… on the length of drying for particle masks. Organosilanes form covalent bonds with the surface through hydrolysis, which provide an excellent platform for further steps of chemical modification. The head groups of organosilane nanopatterns can be designed to generate spatial selectivity for …
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Synthesis and Characterization of Pyrrole Based Adhesion Promoter Systems on Oxide Substrates
… and 1-substituted pyrrole alkyl organosilanes with different chain length were designed and successfully synthesized as adhesion promoters. These new derivatives were studied for their adsorption behavior on oxide substrates and chemical or electrochemical deposition of …
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Critical considerations in development of mesoporous silica nanoparticles for biological applications.
… introduction of hydrophilic and hydrophobic organosilanes and hydrothermal treatment are key to synthesize ultrastable and redispersible mesoporous silica nanoparticles. Chapter Three examines the cytotoxicity of mesoporous silica nanoparticles to human RBCs, mouse mast cells, and human …
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Scanning Probe Investigations of Magnetic Nanoparticles, Protein Binding and the Synthesis of Rare Earth Oxide Nanoparticles Using Nanoscale Lithography
Approaches to prepare spatially selective surfaces were developed in this dissertation for constructing assemblies of biomolecules and inorganic materials. Nanoscale surface patterns of organic thin films were prepared using particle lithography combined with organosilane chemistry. Biological and …