Direct Observation of Double Layer Interactions between the Potential-controlled Gold Electrode Surfaces Using the Electrochemical Surface Forces Apparatus

• DOI: 10.1246/cl.2011.674
• Publication Date: 2011-05-30T06:09:25Z
• Authors: Toshio Kamijo; Motohiro Kasuya; Masashi Mizukami; Kazue Kurihara
• Keywords: Standard electrode potential; Double layer (biology); Electrochemical potential

Abstract We have designed a new apparatus, an electrochemical SFA, for measuring the forces between symmetric gold electrode surfaces under potential control. The surface separation was determined by two-beam (twin-path) interferometry. applied to (working electrode) in 1 mM aqueous KClO4 using Ag/AgCl as reference and Pt counter electrode. observed van der Waals attraction double layer repulsion which decreased with increasing from −0.1 0.2 V (vs. Ag/AgCl).