DIRECT MEASUREMENT OF THE ADSORPTION-KINETICS OF ALKANETHIOLATE SELF-ASSEMBLED MONOLAYERS ON A MICROCRYSTALLINE GOLD SURFACE

Authors
KARPOVICH DS BLANCHARD GJ
Citation
Ds. Karpovich et Gj. Blanchard, DIRECT MEASUREMENT OF THE ADSORPTION-KINETICS OF ALKANETHIOLATE SELF-ASSEMBLED MONOLAYERS ON A MICROCRYSTALLINE GOLD SURFACE, Langmuir, 10(9), 1994, pp. 3315-3322
Citations number
42
Categorie Soggetti
Chemistry Physical
Journal title
Langmuir → ACNP
ISSN journal
07437463
Volume
10
Issue
9
Year of publication
1994
Pages
3315 - 3322
Database
ISI
SICI code
0743-7463(1994)10:9<3315:DMOTAO>2.0.ZU;2-E
Abstract
We report measurements on the adsorption kinetics of alkanethiolate mo nolayers onto a microcrystalline gold surface. Our data indicate that the formation of this monolayer is rapid and is described by the Langm uir adsorption isotherm. The concentration dependence of the monolayer formation rate indicates that there exists an equilibrium for the ads orption/desorption process. We determine from these measurements Delta G(ads) = -5.5 kcal/mol for 1-C18H37SH in n-hexane and cyclohexane ads orbing onto gold and Delta G(ads) = -4.4 kcal/mol for 1-C8H17SH in n-h exane adsorbing onto gold.