Electrochemical detection of nanoscale phase separation in binary self-assembled monolayers

CHED 411

Georgia Lemen, gelemen@georgefox.edu, Whittney Warren, whharris@georgefox.edu, and R. Carlisle Chambers, cchamber@georgefox.edu. Department of Chemistry, GEorge Fox University, 416 N. Meridian St., #4606, Newberg, OR 97132
Developing methods to probe the nature and structure of nanoscale environments continues to be a challenge in nanoscience. We report a cyclic voltammetry investigation of two systems that use internal, hydrogen-bonding to drive phase separation of amide-containing thiols on gold. In the first system, an amide-containing thiol with a terminal ferrocene carboxylate functional group was mixed with a amide-containing thiol diluent in which the orientation of the amide functional group is reversed relative to the electrochemicallly active probe thiol. The second SAM system uses an amide-containing diluent thiol and a triamide-containing thiol with a terminal ferrocene carboxylate functional group.