Artículos de revistas
Characterization Of Langmuir-blodgett Films Of Parent Polyaniline
Registro en:
Thin Solid Films. , v. 284-285, n. , p. 177 - 180, 1996.
406090
10.1016/S0040-6090(95)08300-6
2-s2.0-0030232299
Autor
Riul Jr. A.
Mattoso L.H.C.
Telles G.D.
Herrmann P.S.P.
Colnago L.A.
Parizotto N.A.
Baranauskas V.
Faria R.M.
Oliveira Jr. O.N.
Institución
Resumen
Conducting Langmuir-Blodgett (LB) films have been fabricated from parent polyaniline (PAni) which was doped with functionalized acids. In order to optimize experimental conditions for the formation of stable Langmuir monolayers and their subsequent transfer onto solid substrates, PAni was dissolved in ten different combinations of chloroform solutions. Use was made of camphor sulfonic acid, dodecyl benzene sulfonic acid, and toluenesulfonic acid, and of the solvents N-methyl pyrrolidine and m-cresol as processing agents. Because acidic subphases have been employed, as-deposited LB films were already doped, which was confirmed by the appearance of a polaronic band in the UV-Vis absorption spectra. The absorbance peak increases with the number of deposited layers indicating that a suitable multilayer buildup is accomplished. When analysed by atomic force microscopy, PAni LB films show a fibrillar structure with the fibril width ranging from ≈ 60 to 160 nm. 284-285
177 180 Cao, Y., Smith, P., Heeger, A.J., (1993) Synth. Met., 55-57, p. 3514 Riul A., Jr., Mattoso, L.H.C., Mello, S.V., Telles, G.D., Oliveira O.N., Jr., (1995) Synth. Met., 71, p. 2067 Mattoso, L.H.C., MacDiarmid, A.G., Epstein, A.J., (1994) Synth. Met., 68, p. 1 Mattoso, L.H.C., Mello, S.V., Riul A., Jr., Oliveira O.N., Jr., Faria, R.M., (1994) Thin Solid Films, 244, p. 714 Cheung, J.H., Rubner, M.F., (1994) Thin Solid Films, 244, p. 990 Agbor, M.E., Petty, M.C., Monkman, A.P., Harris, M., (1993) Synth. Met., 55-57, p. 3789 Punkka, E., Laakso, K., Stubb, H., Levon, K., Zheng, W.-Y., (1994) Thin Solid Films, 515-520, p. 243 MacDiarmid, A.C., Epstein, A.J., (1994) Synth. Met., 65, p. 103 Morgan, H., Taylor, D.M., Oliveira O.N., Jr., (1991) Biochim. Biophys. Acta, 1062, p. 149 Cheung, J.H., (1993), Ph.D. Thesis, Massachusetts Institute of Technology, EUAMacDiarmid, A.G., Epstein, A.J., (1993) Brazilian Conf. on Polymers, p. 544. , São Paulo, Brazil, October Brazilian Polymer Association, São Carlos, Brazil Mantovani, J.G., Warmack, R.J., Annis, B.K., MacDiarmid, A.G., Scherr, E., (1990) J. Appl. Polym. Sci., 40, p. 1693