A combined structural and electrochemical study of self-assembled monolayers of the azobenzene-containing alkane thiol N-(2-mercaptoethyl)-4-phenylazobenzamide on Au(111) by scanning tunneling microscopy, synchrotron X-ray reflectivity, and cyclic voltammetry is presented. Densely packed monolayers are observed, in which the molecules are arranged in chains forming an ordered (root 13 x root 3) structure with a coverage of 2/7 ML. The molecules are tilted by 40 degrees relative to the surface normal, resulting in a monolayer thickness of 13.7 angstrom. A total charge of 65.2 +/- 4.3 mu C/cm(2) corresponding to 1(e-) per molecule and apparent electron transfer coefficients of approximate to 0.5 are found. (C) 2008 Elsevier B.V. All rights reserved.