Investigation of an interdigitated array electrode using ic-SECM – Scanning Probes – Application Note 13

Abstract

ic-SECM has been used to measure a gold InterDigitated Array (IDA) provided by ELISHA Systems Ltd [1]. Using ic-SECM the electrochemical nature of the IDA electrode without interference from the sample topography, or tilt, is shown.

Introduction

ic-SECM has been used to measure a gold InterDigitated Array (IDA) provided by ELISHA Systems Ltd [1]. Using ic-SECM the electrochemical nature of the IDA electrode without interference from the sample topography, or tilt is shown. IDAs are microband electrodes composed of two sets of interlocking conductive fingers. Each set of conductive fingers can be controlled separately by connection to a conductive pad. The separate control of these fingers is key to the widespread use of the IDA electrodes in sensor applications as this allows them to be biased separately, helping to increase their sensitivity compared to other electrode geometries [2-3]. It can be important to understand fully how these arrays act electrochemically, making them of interest for SECM studies [4].

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