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Proceedings Paper

Morphological characteristics of polypyrrole film fabricated by electrochemical polymerization
Author(s): Dongbok Kim; Jihong Kim; Sang-Wook Ha; Hyunwoo Cho; Seung-Ki Lee; James Jungho Pak
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Paper Abstract

The morphological characteristics such as surface area, thickness, and roughness of the Polypyrrole (PPy) on metal electrodes of electrochemical sensors affect sensitivity and selectivity of electrochemical sensors because the surface morphology of PPy affects reduction and oxidation of the electrodes. The PPy morphology was investigated by changing several polymerization parameters such as polymerization time, electrolytes, and metal electrodes. Indium tin oxide (ITO) or Au was used as a seed metal electrode on which PPy was electropolymerized. The electropolymerization was performed in an electrolyte, either sodium dodecyl sulfate (NaDS) or sodium dodecyl benzene sulfonate (NaDBS). A homogeneous PPy morphology was obtained on ITO electrode when NaDBS solution was used as an electrolyte, but when NaDS solution was used for polymerizing on ITO electrode, the electropolymerized PPy showed uniform surface morphology and film thickness up to 1 min polymerization time while further polymerization resulted in non-uniform networks like a spider web. This increases the detection surface area with identical metal electrodes of electrochemical sensors. When Au was used, neither NaDBS nor NaDS solution resulted in any morphology change of the PPy film regardless of the polymerization time. The effect of the PPy morphology on the electrochemical sensors will also be presented.

Paper Details

Date Published: 27 July 2004
PDF: 8 pages
Proc. SPIE 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems, (27 July 2004); doi: 10.1117/12.539650
Show Author Affiliations
Dongbok Kim, Korea Univ. (South Korea)
Jihong Kim, Korea Univ. (South Korea)
Sang-Wook Ha, Korea Univ. (South Korea)
Hyunwoo Cho, Korea Univ. (South Korea)
Seung-Ki Lee, Dankook Univ. (South Korea)
James Jungho Pak, Korea Univ. (South Korea)

Published in SPIE Proceedings Vol. 5384:
Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems
Eric Udd; Daniele Inaudi, Editor(s)

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