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Protonation effects in polyaniline langmuir films investigated by surface potential measurements
- Source :
- Synthetic Metals. 84:773-774
- Publication Year :
- 1997
- Publisher :
- Elsevier BV, 1997.
-
Abstract
- Doping parent polyaniline (PANI) and its derivatives has been proven essential for obtaining stable Langmuir monolayers that are amenable to transfer onto solid substrates by the Langmuir-Blodgett (LB) technique. The doping process is generally carried out on the Langmuir trough, by spreading the polymer on an acidic subphase. The degree of doping affects the monolayer surface potential as the positive contribution from the double-layer increases with increasing protonation of the polymer molecules. One could then expect that the surface potential should increase with the acidic concentration in the subphase, but instead the potential diminishes for increasing concentration in the range 10−4 − 10.1 M. Interestingly, the results may be discussed in terms of the simple Gouy-Chapman theory, despite the complexity of the macromolecules involved.
- Subjects :
- chemistry.chemical_classification
Langmuir
Mechanical Engineering
Doping
technology, industry, and agriculture
Metals and Alloys
Protonation
Polymer
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
chemistry.chemical_compound
Chemical engineering
chemistry
Mechanics of Materials
Monolayer
Polyaniline
Materials Chemistry
Organic chemistry
Molecule
lipids (amino acids, peptides, and proteins)
Macromolecule
Subjects
Details
- ISSN :
- 03796779
- Volume :
- 84
- Database :
- OpenAIRE
- Journal :
- Synthetic Metals
- Accession number :
- edsair.doi...........824c6c155d0b45878a1949b5c6ff7f4c