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Probing carboxylic acid groups in replaced and mixed self-assembled monolayers by individual ionized dendrimer molecules :  an atomic force microscopy study.

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Probing carboxylic acid groups in replaced and mixed self-assembled monolayers by individual ionized dendrimer molecules :  an atomic force microscopy study.

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Title: Probing carboxylic acid groups in replaced and mixed self-assembled monolayers by individual ionized dendrimer molecules :  an atomic force microscopy study.
Author: Zhang, Hua.; Grim, P. C. M.; Liu, Daojun.; Vosch, T.; De Feyter, Steven.; Wiesler, U. M.; Berresheim, A. J.; Müllen, K.; Van Haesendonck, C.; Vandamme, N.; De Schryver, F. C.
Copyright year: 2002
Abstract: Polyphenylene dendrimer molecules, G2Td(COOH)16, were ionized (G2 ions) and then adsorbed on a carboxylic acid (COOH) group terminated self-assembled monolayer (SAM) on a Au substrate through the linkage with Cu2+ ions. The individual G2 ions were observed by noncontact atomic force microscopy (NCAFM). The strong interaction between the G2 and Cu2+ ions, the latter of which are preadsorbed on the COOH SAM, led to a compression or deformation of the SAM and resulted in a decreased height of the G2 ions measured by NCAFM as compared to a theoretical model of the dendrimer molecules. The present method offers an approach to bind dendrimer molecules to a solid substrate and to study the nanoscale behavior of two kinds of thiol molecules in replaced and mixed SAMs.
Subject: DRNTU::Engineering::Materials.
Type: Journal Article
Series/ Journal Title: Langmuir
School: School of Materials Science and Engineering
Rights: © 2002 American Chemical Society.

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