Geoffrey R. Hutchison - Department of Chemistry and Materials Research Center, Northwestern University, Evanston, Illinois 60208-3113
Mark A. Ratner - Department of Chemistry and Materials Research Center, Northwestern University, Evanston, Illinois 60208-3113
Tobin J. Marks - Department of Chemistry and Materials Research Center, Northwestern University, Evanston, Illinois 60208-3113
R. Naaman - Weizmann Institute of Science