Surface modification of graphite plus polymer composite and ITO electrodesby Nafion (R) plus cupromeronic phthalocyanine films

The surface of indium tin oxide (ITO) and graphite + polymer composite elec trodes can be modified by Nafion(R) films containing a little amount of dis persed electroactive substances, such as phthalocyanines. This procedure al lows the recovery of electroanalytical information on the electroactive dep osited substance. The preparation methods for these types of modified elect rodes are discussed from the voltammetric results obtained in this work. Th e Nafion(R) net acts as a permeable membrane to the hydrogen ions. Furtherm ore. the presence of methylviologen within the Nafion(R) film makes the ele ctron transport throughout this membrane easy. (C) 1999 Elsevier Science Lt d. All rights reserved.