Journal Article

PreJuSER-9564

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Surface diffusion constants of large organic molecules determined from their residence times under a scanning tunneling microscope tip

Ikonomov, J. ; Bach, P. ; Merkel, R.FZJ* ; Sokolowski, M.FZJ*

2010
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10988  doi:10.1103/PhysRevB.81.161412

Abstract: We introduce a method to determine the lateral diffusion constants of planar organic molecules adsorbed on surfaces from the temporal width tau of pulses in the tunneling current measured for a stationary scanning tunneling microscope tip. The method uses the molecular footprint as a scale bar and evaluates tau as the first-passage time. Temperature-dependent diffusion constants are reported for the two model molecules copper phthalocyanine and 3,4,9,10-perylene-tetracarboxylic-dianhydride adsorbed on the Ag(100) surface.

Keyword(s): J

Note: We thank Ch. Schmitz for experimental help and E. Barkai for theoretical advice. Support by the DFG is acknowledged.

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Contributing Institute(s):

1. Biomechanik (IBN-4)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)

Appears in the scientific report 2010

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