Plasma-Polymerized 4, 4'-Methylenedianiline Membrane Formed on Platinum as Chemically Modified Electrode for pH

Abstract

4, 4'-Methylenedianiline was plasma-polymerized on a platinum plate; the monomer was sublimated, followed by discharging for polymerization. The emf between the platinum plate covered with the plasma-polymerized film and Ag/AgCl electrode was measured, and it was found that a nearly Nernstian response to pH (slope of -60 mV pH^-1)was given over the range 4 to 10. The film was characterized with scanning electron microscope and Fourier-transform infrared spectroscopy.