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

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Description

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.

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17 p.

Creation Information

Mayer, Thomas M.; Michalske, Terry A. & Shinn, Neal D. August 10, 1999.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

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.

Physical Description

17 p.

Notes

OSTI as DE00009716

Medium: P; Size: 17 pages

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  • Journal Name: Tribology Letters; Other Information: Submitted to Tribology Letters

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  • Report No.: SAND99-2080J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 9716
  • Archival Resource Key: ark:/67531/metadc793002

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Creation Date

  • August 10, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 7, 2017, 3:46 p.m.

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Mayer, Thomas M.; Michalske, Terry A. & Shinn, Neal D. Structure-Dependent Viscoelastic Properties of C(9)-Alkanethiol Monolayers, article, August 10, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc793002/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.