Study of the formation process of an azobenzene self-assembled monolayer on gold surface

The formation kinetics of the self-assembled monolayer (SAM) of an azobenzenealkanethiol,denoted as AzoC2SH on surface was studied using electrochemical techniques,and the monolayers prepared at different assembly times and concentration were also investigated.A two-step adsorption kinetics has been...The formation kinetics of the self-assembled monolayer (SAM) of an azobenzenealkanethiol. denoted as AzoC2SH on gold surface was studied using electrochemical techniques, and the monolayers prepared at different assembly times and concentration were also investigated. A two-step adsorption kinetics has been confirmed: the fast adsorption process and the following long-term reorganization. The equilibrium constant (K) for the adsorptioon and the interaction factor between adsorbate-adsorbate: molecules (delta) were evaluated based on the Frumkin isotherm and determined to be (3.17+/-0.13)x10(6) mol.L-1 and -0.34+/-0.04: respectively. The Gibbs free energy (Delta G) of SAM was determined to be -(37.07+/-0.13) kJ.mol(-1).http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000076166300015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701SCI(E)中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)609846-8511