Forces with submolecular resolution between the probing tip and Cu-TBPP molecules on Cu(100) observed with a combined AFM/STM

Autor:	James K. Gimzewski, Ch. Loppacher, Reto R. Schlittler, Ernst Meyer, M. Bammerlin, M. Guggisberg, R. Lüthi, H.-J. Güntherodt
Rok vydání:	2001
Předmět:	Crystallography Atomic force microscopy Chemistry Resolution (electron density) Monolayer Molecule Frequency shift General Materials Science General Chemistry Substrate (electronics) Bending Molecular physics
Zdroj:	Applied Physics A. 72:S105-S108
ISSN:	1432-0630 0947-8396
DOI:	10.1007/s003390100643
Popis:	Combined STM/AFM experiments were performed on monolayer islands of Cu-TBPP molecules on Cu(100). Pulling of single molecules on the substrate was observed and the imaging parameters were compared to STM studies. Local frequency shift vs. distance curves reveal three types of curves, which can be related to the interaction of the tip above the Cu(100) substrate, the centre of the molecule and the leg of the molecule. The frequency vs. distance curves above the legs reveal two minima, which are associated with the bending of the legs above a certain threshold value. Quantitative analysis yields force values of about 0.4 nN.
Databáze:	OpenAIRE
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