关键词: 化学修饰电极, 聚苯胺, 膜厚度公式

Polyaniline films were prepared on platinum electrode from an aqueous solution of monomer containing HCl or H2SO4. Films were grown using a galvanostatic or cyclic sweep voltammetry. The thickness of the films (d) was estimated from the following equation where G is the molar mass of leucoemeraldine, (Qf)m is the faradaic oxidation charge, nf is the no. of electron involved in a redox process, f is Faraday's constant, p is the estimated d. of the film, A is the area of the electrode, g is the roughness factor of electrode. The equation was verified successfully. Experimental results are in good agreement with the theor. values. The observed and calculated values of p and molar volume are listed in the paper also.

Key words: CHEMICAL MODIFIED ELECTRODE, POLYANILINE