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Title: Frictional properties of thin chain alcohol films

Abstract

We used the surface forces apparatus (SFA) to measure the viscosity and friction of confined films of octanol and undecanol as a function of film thickness. We find that strongly surface-bound monolayers form. These monolayers display solid-like stick-slip motion upon shearing. Additional liquid between these monolayers shows liquid-like viscosity. The transition from liquid-like to solid-like friction occurs abruptly upon the expulsion of the last liquid-like layer. For the surface-bound monolayers, the stick-slip motion is investigated as a function of both sliding speed and load. We find a well-defined critical shear stress, which depends only weakly on sliding speed.

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab., CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
OSTI Identifier:
775114
Report Number(s):
LBNL-45651
Journal ID: ISSN 0021-9606; JCPSA6; R&D Project: 517950; TRN: AH200110%%101
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 114; Journal Issue: 4; Other Information: Journal Publication Date:1/22/2001; PBD: 8 May 2000; Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALCOHOLS; FRICTION; OCTANOLS; SHEAR; THICKNESS; VISCOSITY; PHASE TRANSFORMATIONS

Citation Formats

Mugele, Friedrich, and Salmeron, Miquel. Frictional properties of thin chain alcohol films. United States: N. p., 2000. Web.
Mugele, Friedrich, & Salmeron, Miquel. Frictional properties of thin chain alcohol films. United States.
Mugele, Friedrich, and Salmeron, Miquel. Mon . "Frictional properties of thin chain alcohol films". United States.
@article{osti_775114,
title = {Frictional properties of thin chain alcohol films},
author = {Mugele, Friedrich and Salmeron, Miquel},
abstractNote = {We used the surface forces apparatus (SFA) to measure the viscosity and friction of confined films of octanol and undecanol as a function of film thickness. We find that strongly surface-bound monolayers form. These monolayers display solid-like stick-slip motion upon shearing. Additional liquid between these monolayers shows liquid-like viscosity. The transition from liquid-like to solid-like friction occurs abruptly upon the expulsion of the last liquid-like layer. For the surface-bound monolayers, the stick-slip motion is investigated as a function of both sliding speed and load. We find a well-defined critical shear stress, which depends only weakly on sliding speed.},
doi = {},
journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 4,
volume = 114,
place = {United States},
year = {2000},
month = {5}
}