Abstract
An electrostatic self-assembly process based on layer-by-layer deposition was employed to prepare thin films of charged polyaniline (PANI) and two polyanions: poly(styrene sulphonate) (PSSA) and an 18-base oligonucleotide (ON). The concentrations of polyion depositing solutions were varied and the effect on the thin films' properties was examined. The layer-by-layer deposition was monitored by means of UV-Vis spectroscopy, and it was shown that in all investigated cases the deposition of bilayers is linear in respect to the number of deposited bilayers. The UV-Vis results confirmed that ONs easily incorporate into PANI/ON films. Cyclic voltammetry experiments revealed different electrochemical behaviour of PANI/PSSA and PANI/ON films, with PANI/ ON films showing less electroactivity. Scanning Electron Microscopy analysis showed significantly different morphology of those films.
| Original language | English |
|---|---|
| Pages (from-to) | 96-102 |
| Number of pages | 7 |
| Journal | Thin Solid Films |
| Volume | 497 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - 21 Feb 2006 |
| Externally published | Yes |
Keywords
- Polyaniline
- Polyanion
- Raman spectroscopy
- Self-assembly
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