Probing Carboxylic Acid Groups in Replaced and Mixed Self-Assembled Monolayers by Individual Ionized Dendrimer Molecules: An Atomic Force Microscopy Study
| Autor: | P. C. M. Grim, N. Vandamme, Klaus Müllen, Tom Vosch, Uwe-Martin Wiesler, F. C. De Schryver, S. De Feyter, A. J. Berresheim, D. J. Tiu, Hua Zhang, C. Van Haesendonck |
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| Přispěvatelé: | School of Materials Science & Engineering |
| Rok vydání: | 2002 |
| Předmět: |
chemistry.chemical_classification
Stereochemistry Carboxylic acid Nanoparticle Substrate (chemistry) Self-assembled monolayer Surfaces and Interfaces Condensed Matter Physics Engineering::Materials [DRNTU] Crystallography Adsorption chemistry Dendrimer Monolayer Electrochemistry Molecule General Materials Science Spectroscopy |
| Zdroj: | Langmuir. 18:1801-1810 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la011061t |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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