ORGANIC MONOLAYERS ON SI(111) BY ELECTROCHEMICAL METHOD

This work details the formation of organic monolayers on Si(111) by el ectrochemical methods. We show that grafting of phenyl groups is possi ble by reduction of N-+(2)-Ar-X cations where the substituent X may be Pr, NO2, COOH, CN, CnH2n + 1 (n = 1, 4, 12). Characterizations show t hat the electrochemical process is self stopped after completion of th e first monolayer whose structure is (2 x 1) close packed in the case X = Br and CH3 as observed by STM. The stability and passivating prope rties of films are also investigated. (C) 1998 Published by Elsevier S cience Ltd. All rights reserved.