Abstract
The surface-enhanced Raman spectroscopy (SERS) of polypyrrole (PPy) can be obtained by roughening the Au substrate with electrochemical oxidation-reduction cycle (ORC) before PPy deposition. The optimum condition for obtaining SERS effect is based on the strongest peak of C=C backbone stretching of PPy located at ca. 1600 cm-1 shown in SERS. The optimum preparation conditions are as follows. Cathodic and anodic vertex potentials are -300 and 1200 mV vs. SCE, respectively. Delays at cathodic and anodic vertex potentials are 10 and 2 s, respectively. Cathodic and anodic scan rates are 500 and 1000 mVs-1, respectively. The ORC cycle is 25 times. Also, the result indicates that the SERS effect decreases with increasing the charge passed for PPy deposition.
| Original language | English |
|---|---|
| Pages (from-to) | 129-134 |
| Number of pages | 6 |
| Journal | Materials Chemistry and Physics |
| Volume | 73 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - Jan 15 2002 |
| Externally published | Yes |
Keywords
- Oxidation-reduction cycle
- Polypyrrole
- Surface-enhanced Raman spectroscopy
ASJC Scopus subject areas
- Condensed Matter Physics
- General Materials Science
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