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Title: Structure-Dependent Viscoelastic Properties of C(9)-Alkanethiol Monolayers

Abstract

Quartz crystal microbalance techniques and in situ spectroscopic ellipsometry are used to probe the structure-dependent intrinsic viscoelastic properties of self-assembled CH{sub 3}(CH{sub 2}){sub 8}SH alkanethiol monolayer adsorbed from the gas phase onto Au(111)-textured substrates. Physisorbed molecules, mixed chemisorbed-fluid/solid phases and solid-phase domain boundaries make sequentially dominant contributions to the measured energy dissipation in the growing monolayer. Deviations from Langmuir adsorption kinetics reveal a precursor-mediated adsorption channel. These studies reveal the impact of structural heterogeneity in tribological studies of monolayer lubricants.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
9716
Report Number(s):
SAND99-2080J
TRN: AH200125%%25
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Tribology Letters
Additional Journal Information:
Other Information: Submitted to Tribology Letters; PBD: 10 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; ADSORPTION; ENERGY LOSSES; LUBRICANTS; SUBSTRATES; GOLD; SURFACE PROPERTIES; THIOLS; CHEMISORPTION; TRIBOLOGY; ALKANETHIOL; SELF-ASSEMBLED MONOLAYERS; QUARTZ CRYSTAL MICROBALANCE; VISCOELASTICITY; KINETICS; ELLIPSOMETRY

Citation Formats

Mayer, Thomas M., Michalske, Terry A., and Shinn, Neal D. Structure-Dependent Viscoelastic Properties of C(9)-Alkanethiol Monolayers. United States: N. p., 1999. Web.
Mayer, Thomas M., Michalske, Terry A., & Shinn, Neal D. Structure-Dependent Viscoelastic Properties of C(9)-Alkanethiol Monolayers. United States.
Mayer, Thomas M., Michalske, Terry A., and Shinn, Neal D. Tue . "Structure-Dependent Viscoelastic Properties of C(9)-Alkanethiol Monolayers". United States. https://www.osti.gov/servlets/purl/9716.
@article{osti_9716,
title = {Structure-Dependent Viscoelastic Properties of C(9)-Alkanethiol Monolayers},
author = {Mayer, Thomas M. and Michalske, Terry A. and Shinn, Neal D.},
abstractNote = {Quartz crystal microbalance techniques and in situ spectroscopic ellipsometry are used to probe the structure-dependent intrinsic viscoelastic properties of self-assembled CH{sub 3}(CH{sub 2}){sub 8}SH alkanethiol monolayer adsorbed from the gas phase onto Au(111)-textured substrates. Physisorbed molecules, mixed chemisorbed-fluid/solid phases and solid-phase domain boundaries make sequentially dominant contributions to the measured energy dissipation in the growing monolayer. Deviations from Langmuir adsorption kinetics reveal a precursor-mediated adsorption channel. These studies reveal the impact of structural heterogeneity in tribological studies of monolayer lubricants.},
doi = {},
journal = {Tribology Letters},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}