title: Microelectrode arrays with overlapped diffusion layers as electroanalytical detectors: theory and basic applications.
abstract: 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.
authors.affiliation: Department of Chemistry & Physics, Faculty of Education, Catholic University in Ružomberok, Hrabovská cesta 1, SK-034 01, Ružomberok, Slovak Republic. peter.tomcik@ku.sk.
authors.forename: Peter
authors.initials: P
authors.lastname: Tomčík
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D004563:Electrochemistry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D046228:Microarray Analysis / Q000295:instrumentation*; D008839:Microelectrodes; D014159:Transducers