Layer-by-layer self-assembly of conducting multilayer film from poly(sodium styrenesulfonate) and polyaniline.
Highly oriented polyaniline (PANI) fiber was prepared by a polymerization at higher temperature and growth in lower temperature. Poly(sodium styrenesulfonate)/polyaniline multilayer film (PSS/PANI)(n) was layer-by-layer molecular-level self-assembled by a simple technique. The morphology and structure of the oriented PANI fiber were characterized, showing an emeraldine state and ordered molecular structure. The growth process and surface topography of the (PSS/PANI)(n) multilayer film were characterized by UV-vis spectroscopy and atomic force microscopy. Absorbance plotted against the bilayers exhibited a linear dependence, indicating a progressive and uniform deposition process of the multilayer film. The (PSS/PANI)(n) multilayer film exhibited an electrical conductivity in the order of 1 S cm(-1), and when bilayer number exceeded a threshold value of 4, the conductivity of the multilayer film increased dramatically. The electrochemical properties were studied through cyclic voltammograms, and it was found that the electrochemical activity of the (PSS/PANI)(n) film increased with the increase of the bilayer number.
Tang
Qunwei
Q
The Key Laboratory for Functional Materials of Fujian Higher Education, Institute of Material Physical Chemistry, Huaqiao University, Quanzhou 362021, People's Republic of China.
Wu
Jihuai
J
Sun
Xiaoming
X
Li
Qinghua
Q
Lin
Jianming
J