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Responsive monolayers are key building blocks for future applications in organic and molecular electronics in particular because they hold potential for tuning the physico-chemical properties of interfaces, including their energetics. Here we study a photochromic SAM based on a conjugated azobenzene derivative and its influence on the gold work function (ΦAu) when chemisorbed on its surface. In particular we show that the ΦAu can be modulated with external stimuli by controlling the azobenzenetrans/cisisomerization process. This phenomenon is characterized experimentally by four different techniques, kelvin probe, kelvin probe force microscopy, electroabsorption spectroscopy and ultraviolet photoelectron spectroscopy. The use of different techniques implies exposing the SAM to different measurement conditions and different preparation methods, which, remarkably, do not alter the observed work function …
Royal Society of Chemistry
Publication date: 
1 Jan 2011

N Crivillers, A Liscio, F Di Stasio, C Van Dyck, S Osella, D Cornil, S Mian, GM Lazzerini, O Fenwick, E Orgiu, F Reinders, Slawomir Braun, Mats Fahlman, M Mayor, J Cornil, V Palermo, F Cacialli, P Samorì

Biblio References: 
Volume: 13 Issue: 32 Pages: 14302-14310
Physical Chemistry Chemical Physics