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Modeling of NC‐AFM Imaging of Alkanethiols on the Au (111) Surface
Author(s) -
Sushko Maria L.,
Kalampokidis Alexandros,
Gal Andrei Y.,
Shluger Alexander L.
Publication year - 2008
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/ijc.48.2.99
Subject(s) - chemistry , electrostatics , atomic force microscopy , polar , contrast (vision) , monolayer , surface (topology) , electrostatic interaction , nanotechnology , chemical physics , optics , geometry , biochemistry , materials science , physics , mathematics , astronomy
We investigate the mechanisms of contrast formation in NC‐AFM imaging of self‐assembled monolayers of alkanethiols on the Au (111) surface. Comparing the potential models with implicit and explicit electrostatics, we demonstrate that, similar to the imaging of polar solid surfaces, the electrostatic interaction plays the central role in contrast formation. Careful comparison of several tip models showed that the model of a clean SiO 2 tip gives the closest agreement with the experimental data.