ESCA and TOF-SIMS study on oxidised and reduced polypyrrole-poly(4-styrenesulfonate) free-standing films synthesized on Ti electrodes
Document Type
Article
Publication Date
1-1-2000
Abstract
Thin films of polypyrrole, composited with poly(4-styrenesulfonate), formed electrochemically on titanium plate electrodes could be peeled off readily as free standing films, before and after reduction in the aqueous forming solution. Both surfaces (electrolyte side and electrode side) of such free standing films had been investigated using electron spectroscopy for chemical analysis (ESCA) and time of flight secondary ion mass spectrometry (TOF-SIMS). The morphologies for the electrolyte sides of both oxidized and reduced forms of such polypyrrole composite films were clearly different from those of the electrode sides, but little difference in surface conductivity between the two sides of each form was detectable using the four-point probe technique. ESCA spectra showed high sodium ion presence on the surfaces of the reduced form but not detectable on the surfaces of the oxidized form. Secondary electron images and ion maps of sampled areas on the films from the TOF-SIMS study revealed some interesting surface features.
Keywords
ESCA, Ion mapping, Poly(4-styrene-sulfonate), Polypyrrole, Titanium electrodes, TOF-SIMS
Divisions
CHEMISTRY
Funders
University of Malaya,IRPA Grant from the Malaysian Government
Publication Title
Electrochemistry Communications
Volume
2
Issue
10
Additional Information
Sin, S.-L., Teo, L.-L., Tan, K.-S., Chan, C.-Y. Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.