Self-Assembled Monolayers As Models For Silica
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چکیده
منابع مشابه
Two-Dimensional Diffusion of Prodan on Self-Assembled Monolayers Studied by Fluorescence Recovery after Photobleaching
Fluorescence recovery after photobleaching (FRAP) is used to determine diffusion constants for the dye molecule 6-propionyl-2-dimethylaminonaphthalene (prodan) on silica and on a variety of organic monolayers grafted onto silica. Similar diffusion constants of ∼2 × 10-7 cm2/s are found for prodan on chlorotrimethylsilane (CTS) based self-assembled monolayers and on silanated poly(ethylene glyco...
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Mesoporous silica nanoparticles (MSNs) containing vinyl-, propyl-, isobutyl- and phenyl functionalized monolayers were reported. These functionalized MSNs were prepared via molecular self-assembly of organosilanes on the mesoporous supports. The relative surface coverage of the organic monolayers can reach up to 100% (about 5.06 silanes/nm.
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Atomic force microscopy was used to measure the forces between a silica probe and a carboxylic acidterminated self-assembledmonolayer (SAM) onagold substrate in the presence ofKCl electrolyte solutions of different pH. Silica-silica interaction force measurements were conducted at different pH values to determine the silica probe surface electrostatic potentials under these conditions. The inte...
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The effect of pH on the adhesion of silica and polystyrene latex nanoparticles, presenting hydroxyl and carboxyl acid surface chemistries respectively, to self-assembled monolayers (SAMs) has been investigated. The SAMs studied were 1-dodecanethiol, 11-mercaptoundecanoic acid and an original pyridine-terminated SAM. Adhesion of nanoparticles to the SAMs was found to decrease with increasing pH ...
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