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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

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48999

Wiesler,  U. M.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48459

Müllen,  Klaus
MPI for Polymer Research, Max Planck Society;

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Zitation

Zhang, H., Grim, P. C. M., Tiu, D. J., Vosch, T., De Feyter, S., Wiesler, U. M., et al. (2002). Probing carboxylic acid groups in replaced and mixed self- assembled monolayers by individual ionized dendrimer molecules: An atomic force microscopy study. Langmuir, 18(5), 1801-1810.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-666A-A
Zusammenfassung
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.