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Title: Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold

Abstract

The sticking probability, defined as the rate of adsorption per molecular collision with the surface, directly expresses the difficulty encountered by a molecule in scaling the barrier to adsorption. Its prior use has been restricted to adsorption of gases. A method extending this concept to adsorption from liquid solutions is applied to transient measurements of alkylthiol adsorption onto gold from ethanol solutions. The initial sticking probability increases from {approx}10{sup -8} to {approx}10{sup -6} with alkyl chain length, implying a stabilization of the transition state by {approx}0.65 kJ/mol per CH{sub 2} . Since their sticking probabilities in the gas phase are {approx}1.0 , the solvent increases the activation free energy by {approx}40 kJ/mol . (c) 2000 The American Physical Society.

Authors:
;
Publication Date:
OSTI Identifier:
20216618
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 84; Journal Issue: 22; Other Information: PBD: 29 May 2000; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; GOLD; ALKYL RADICALS; ADSORPTION; SOLUTIONS; ETHANOL; LANGEVIN EQUATION; REACTION KINETICS; EXPERIMENTAL DATA

Citation Formats

Jung, Linda S., and Campbell, Charles T. Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold. United States: N. p., 2000. Web. doi:10.1103/PhysRevLett.84.5164.
Jung, Linda S., & Campbell, Charles T. Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold. United States. doi:10.1103/PhysRevLett.84.5164.
Jung, Linda S., and Campbell, Charles T. Mon . "Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold". United States. doi:10.1103/PhysRevLett.84.5164.
@article{osti_20216618,
title = {Sticking Probabilities in Adsorption from Liquid Solutions: Alkylthiols on Gold},
author = {Jung, Linda S. and Campbell, Charles T.},
abstractNote = {The sticking probability, defined as the rate of adsorption per molecular collision with the surface, directly expresses the difficulty encountered by a molecule in scaling the barrier to adsorption. Its prior use has been restricted to adsorption of gases. A method extending this concept to adsorption from liquid solutions is applied to transient measurements of alkylthiol adsorption onto gold from ethanol solutions. The initial sticking probability increases from {approx}10{sup -8} to {approx}10{sup -6} with alkyl chain length, implying a stabilization of the transition state by {approx}0.65 kJ/mol per CH{sub 2} . Since their sticking probabilities in the gas phase are {approx}1.0 , the solvent increases the activation free energy by {approx}40 kJ/mol . (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevLett.84.5164},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 22,
volume = 84,
place = {United States},
year = {2000},
month = {5}
}