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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.
| 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, S.; 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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