Three dimensional hopping conduction in electrochemically prepared polypyrrole (p-TS)

Authors

Ofelia T. Rempillo ⋅ PH Physics Department, De La Salle University
Reuben V. Quiroga ⋅ PH Physics Department, De La Salle University
Maria Carla F. Manzano ⋅ PH Physics Department, De La Salle University
Gil Nonato C. Santos ⋅ PH Physics Department, De La Salle University
Enrique M. Manzano ⋅ PH Physics Department, De La Salle University

Abstract

Conducting polypyrrole (p-TS) films were prepared by anodic deposition of 0.1M pyrrole and 0.05M to 0.20M para-tulouene sulphonate in an aqueous solution. Scanning Electron Microspcope was used to obtain surface topography and film thickness. Resistivity versus Temperature measurements of the electrochemically prepared polypyrroles were obtained by Van der Pauw Techinique at a temperature range of 88 K to 298 K. Free standing polypyrrole films obtained exhibited granular and fibrillar structure. Film thickness ranged from 20 to 50 μm. Conductivity of the films ranged from 18.04 to 198.9 S/cm. Temperature dependent measurements of the resistivity showed resistivity decreases with temperature. A T^−1/4 dependence of the logarithm of resistivity was obtained consistent with Mott’s variable range hopping conduction model. This indicates that conducting PPy (p-TS) is a highly disordered system where states are localized.

Downloads

Issue

2005: Proceedings of the 23rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2005-PB-58

Section

Poster Session PB

Published

2005-10-26

How to Cite

[1]

OT Rempillo, RV Quiroga, MCF Manzano, GNC Santos, and EM Manzano, Three dimensional hopping conduction in electrochemically prepared polypyrrole (p-TS), Proceedings of the Samahang Pisika ng Pilipinas 23, SPP-2005-PB-58 (2005). URL: https://proceedings.spp-online.org/article/view/SPP-2005-PB-58.