INIFTA   05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Self Assembled Monolayers of Thiols on Gold: from Planar to Irregular Surfaces
Autor/es:
C. VERICAT; G. A. BENITEZ; D.E. GRUMELLI; M.E. VELA; R. C. SALVAREZZA
Revista:
JOURNAL OF PHYSICS CONDENSED MATTER
Editorial:
Institute of Physics
Referencias:
Año: 2008 p. 1840041 - 1840048
ISSN:
0953-8984
Resumen:
Thiol-capped metals, in particular gold, have a wide range of technological applications,
especially for building systems by bottom-up methods. In most cases, stability of the organic
film during exposure to ambient conditions and/or to electrolyte solutions is a crucial
requirement. In this work we discuss the stability of butanethiol self-assembled monolayers
(SAMs) on planar, nanocurved and irregular Au surfaces against both air exposure and
electrodesorption in aqueous media. We have found a slower rate of air oxidation and increased
stability against electrodesorption for butanethiol monolayers on highly irregular Au surfaces
as compared to those on planar surfaces. The increased stability of SAMs on highly irregular
surfaces is promising because desorption and degradation seriously limit their application
in nanotechnology.