Monoparticulate films of polyaniline

Monoparticulate films were prepared from colloidal polyaniline (PANI) via the Langmuir–Blodgett (LB) technique. An aqueous dispersion of PANI obtained by aniline polymerization in the presence of polyvinyl alcohol was spread at the air–water interface in a LB trough. The floating films were transfer...

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Bibliographic Details
Published in:Thin solid films 2009-07, Vol.517 (18), p.5459-5463
Main Authors: Tosheva, L., Gospodinova, N., Vidal, L., Mihai, I., Defaux, M., Ivanov, D.A., Doyle, A.M.
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Langmuir–Blodgett method
Monoparticulate films
Optical properties
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Organic polymers
Physicochemistry of polymers
Physics
Polyaniline
Properties and characterization
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Description
Summary:Monoparticulate films were prepared from colloidal polyaniline (PANI) via the Langmuir–Blodgett (LB) technique. An aqueous dispersion of PANI obtained by aniline polymerization in the presence of polyvinyl alcohol was spread at the air–water interface in a LB trough. The floating films were transferred by the vertical lifting method to Si wafer or glass substrates. The films were very stable and could not be removed during immersion in aqueous solutions for at least several months. The color of dry monoparticulate PANI films was violet independently of the color adapted upon immersion in aqueous media at different pH. We suggest that not only the wavelength of the absorbed light, but also that of the scattered light, has an effect on the color of PANI.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2009.01.113