Scanning electron microscopy studies of PEDOT prepared by various electrochemical routes

Patra, S and Barai, K and Munichandraiah, N (2008) Scanning electron microscopy studies of PEDOT prepared by various electrochemical routes. In: Synthetic Metals, 158 (10). pp. 430-435.

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Abstract

Polyethylenedioxythiophene (PEDOT) is electrochemically prepared as a film on stainless steel (SS) substrate by galvanostatic, potentiostatic and potentiodynamic methods. The oxidation of EDOT to PEDOT takes place at potentials \geq 0.75V vs. SCE (saturated calomel electrode). The growth of PEDOT is continuous during galvanostatic and potentiostatic modes of preparation. On the other hand, the preparation is discontinuous during multicycle potentiodynamic method. This route leads to layer by layer formation, each layer being formed in a potential cycle. The morphology of PEDOT prepared at lowcurrent densities, lowpotential and lowpotential range during cycling is essentially globular. The globules develop porosity at higher current density (c.d.) and higher potentials in the case of galvanostatic and potentiostatic routes, respectively. In the case of higher potential range of potentiodynamic deposition, however, the morphology becomes rod-like and fibrous. This is attributed to discontinuous, layer by layer formation of PEDOT and also to its oxidation.

Item Type:	Journal Article
Publication:	Synthetic Metals
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	PEDOT;SEM;Electrochemical deposition;Globules;Rod-like morphology.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	06 Aug 2008
Last Modified:	19 Sep 2010 04:48
URI:	http://eprints.iisc.ac.in/id/eprint/15462

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