Authors: P Dietrich F Michalik R Schmidt C Gahl G Mao M Breusing M B Raschke B Priewisch T Elsässer R Mendelsohn M Weinelt K RückBraun
Publish Date: 2008/11/01
Volume: 93, Issue: 2, Pages: 285-292
Abstract
A mild and efficient procedure has been developed to obtain covalently attached selfassembled monolayers SAMs on Si111 with photochromic azobenzene headgroups Starting from neat or diluted carboxylic acid functionalized monolayers onchip coupling reactions were applied to attach hydroxylfunctionalized azobenzene units to the SAMs by ester bond formation The modified surfaces were characterized by highresolution Xray photoelectron spectroscopy XPS transmission Fourier transform infrared spectroscopy FTIR and contact angle measurements Reversible cis↔trans isomerizations of photoswitchable SAMs were monitored by wettability measurements
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