Abstract
The multilayers of poly(amido amine) dendrimer (fourth generation amine-terminated, G4NH2) and conducting sulfonated polyaniline (SPANI) were successfully deposited onto solid substrates by alternatively dipping in SPANI and G4NH2 solutions. Multilayer growth was monitored by ultraviolet−visible absorption spectroscopy and Fourier transform infrared-reflection absorption spectroscopy, which revealed an adsorption−desorption phenomenon, although it was sensitive to the concentration and pH of solutions. The average thickness of the SPANI/G4NH2 bilayer obtained from X-ray reflectivity is much smaller than the diameter of G4NH2 with an ideal spherical structure, suggesting that the dendrimer molecules in multilayers are highly compressed along the surface normal. Electron density profiles indicate that the multilayers are highly interpenetrated, and the thickness and molecular arrangement in the multilayers depend on the pH of G4NH2 solutions. Cyclic voltammograms of the multilayers in acidic and neutral ele...
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