Microelectrode Arrays with Overlapped Diffusion Layers as Electroanalytical Detectors: Theory and Basic Applications

Sensors

关键词: photolithography;    interdigitated microelectrode arrays;    microband electrodes;    collection efficiency;    redox cycling;    substitutional stripping analysis;    detection of catecholamines;    neurotransmitters;   

DOI  :  10.3390/s131013659

来源: mdpi

【 摘 要 】

This contribution contains a survey of basic literature dealing with arrays of microelectrodes with overlapping diffusion layers as prospective tools in contemporary electrochemistry. Photolithographic thin layer technology allows the fabrication of sensors of micrometric dimensions separated with a very small gap. This fact allows the diffusion layers of single microelectrodes to overlap as members of the array. Various basic types of microelectrode arrays with interacting diffusion layers are described and their analytical abilities are accented. Theoretical approaches to diffusion layer overlapping and the consequences of close constitution effects such as collection efficiency and redox cycling are discussed. Examples of basis applications in electroanalytical chemistry such as amperometric detectors in HPLC and substitutional stripping voltammetry are also given.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.