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Tribology Studies of Organic Thin Films by Scanning Force Microscopy

Published online by Cambridge University Press:  15 February 2011

G. Bar ,
S. Rubin ,
A. N. Parikh ,
B. I. Swanson  and
T. A. Zawodzinski
G. Bar
Affiliation:
Freiburger Materialforschungszentrum, FMF, Albert-Ludwigs University, Stefan-Meier-Str. 21, 79104 Freiburg, Germany, gbar@fnf.uni-freiburg.de
S. Rubin
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
A. N. Parikh
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
B. I. Swanson
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
T. A. Zawodzinski
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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Abstract

Using the micro-contact printing method we prepared patterned self-assembled monolayers (SAMs) consisting of methyl-terminated alkanethiols of different chain lengths. The samples were characterized using lateral force microscopy (LFM) and the force modulation technique (FMT). In general, higher friction is observed over the short chain regions than over the long chain regions when a low or moderate load is applied to the scanning force microscopy (SFM) tip. For such cases the high friction (short chain) regions are also “softer” as measured by FMT. At high loads, a reversal of the image contrast is observed and the short chain regions show a lower friction than the long chain regions. This image contrast is reversible upon reduction of the applied load.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 436: Symposium CC – Thin Films Stresses and Mechanical Properties VI , 1996 , 269
Copyright
Copyright © Materials Research Society 1997

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