Title

Morphological and voltammetric characterization of different concentrations of spin coated Nafion-Ru(bpy)2+3 thin films

College

College of Science

Department/Unit

Physics

Document Type

Conference Proceeding

Source Title

IOP Conference Series: Materials Science and Engineering

Volume

79

Issue

1

Publication Date

6-10-2015

Abstract

Different concentrations of Ru(bpy)2+3 were successfully deposited on ITO coated glass substrates employing a simple method using a spin coater. The surface morphology was determined by scanning electron microscopy (SEM). The transport mechanism and the diffusion coefficient of the redox mediators within the films were characterized using cyclic voltammetry (CV). The concentrations were varied by dissolving different amounts of the redox mediator in methanol and 5% Nafion. SEM micrographs showed that the roughness of the surface increased with concentration of redox mediator. CV showed successful incorporation of Ru(bpy)2+3. The order of the magnitude of the diffusion coefficients confirmed that the redox mediators were immobilized within the Nafion thin film. The resulting amount of redox mediator immobilized can be manipulated by simply varying the concentration of the casting solution.

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Digitial Object Identifier (DOI)

10.1088/1757-899X/79/1/012032

Disciplines

Physics

Keywords

Ruthenium compounds; Indium tin oxide; Spin glasses; Voltammetry; Scanning electron microscopy

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