ELECTROCHEMICAL QUARTZ-CRYSTAL MICROBALANCE STUDY ON ELECTROPOLYMERIZATION OF M-PHENYLENEDIAMINE - EFFECTS OF ANILINE AND POLYANILINE

Electrochemical oxidative polymerization of m-phenylenediamine (mPD) g ave a nonconducting limited-thickness polymer film on the gold electro de. To obtain new functional films for surface modification, the elect rochemical copolymerization of aniline (An) and mPD at different ratio s of the monomers was performed by potential scanning between -0.1 V a nd 0.92 V (vs. see). With quartz crystal microbalance measurements, th e growth rate of the film and the amount of protein cross-linked on th e polymer film were investigated. The results showed that a - NH2 func tionalized film could be obtained by the copolymerization of An with m PD at appropriate monomer ratio, and that the precoated poly-An film e nhanced not only the depositing rate of poly-mPD but also the immobili zing capacity of the poly-mPD film remarkably.