Thin films of polyaniline–polyacrylic acid composite by chemical bath deposition

• Published in: Thin solid films Vol. 347; no. 1; pp. 241 - 247
• Main Authors: Hu, Hailin, Saniger, José M., Bañuelos, José G.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 22.06.1999; Elsevier Science
• Subjects: Applied sciences; Atomic force microscopy; Chemical bath deposition; Composite thin films; Exact sciences and technology; Fourier transform infrared spectrum; Optical absorption coefficient; Organic polymers; Physicochemistry of polymers; Polyacrylic acid; Polyaniline; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Fourier transform infrared spectrum; Optical absorption coefficient; Atomic force microscopy; Chemical bath deposition; Composite thin films; Polyaniline; Polyacrylic acid; Composite film; Electrical conductivity; Electrical properties; Experimental study; Property processing relationship; Thin film; Conducting polymers; Polyelectrolyte; Ammonium Peroxodisulfates; Morphology; Optical properties; Preparation; Acrylic acid polymer; Chemical deposition; Concentration effect; Oxidative polymerization; Aniline polymer
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/S0040-6090(99)00039-5

Polyaniline (PANI)–polyacrylic acid (PAA) composite thin films were deposited at room temperature on glass and polymethyl methacrylate substrates by introducing these into a freshly prepared chemical bath of HCl, PAA, aniline monomers and (NH 4) 2S 2O 8. Compared to the single PANI films, which were obtained from the same bath constitution but without PAA solution, the composite films showed a red shift at the maximum optical transmittance peak and a slightly lower electrical conductivity. Fourier transform infrared spectroscopy studies of the PANI composite thin films indicated the presence of the acid-base reaction product between PANI and PAA, as well as PAA molecule incorporation in the films. Atomic force microscopy analysis also showed morphologic and mechanical elasticity differences between the single PANI film the composite films deposited by the chemical bath method.