Stripping voltammetry at micro-interface arrays: A review |
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Authors: | Grégoire Herzog Valerio Beni |
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Institution: | 1. Université de Lorraine, LCPME, UMR 7564, Villers-lès-Nancy F-54600, France;2. CNRS, LCPME, UMR 7564, Villers-lès-Nancy F-54600, France;3. Biosensors and Bioelectronics Centre, Department of Physics, Chemistry and Biology (IFM), Linköping University, S-58183 Linköping, Sweden |
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Abstract: | In this article, a comprehensive overview of the most recent developments in the field of stripping voltammetry at regular micro-interfaces (both solid–liquid and liquid–liquid interfaces) is presented. This review will report on the most conventional arrays of metallic micro-electrodes but also on the rapidly growing field of electrochemistry at arrays of micro-interfaces between two immiscible electrolyte solutions (μITIES). The main fabrication methods, together with some design considerations and diffusion phenomena at such interfaces are discussed. Main applications of micro-interface arrays are presented including heavy metals detection at micro-electrode arrays and detection of organic molecules (amino acids, vitamins, peptides and drugs) at the μITIES. Stripping analysis at micro-interface arrays is suitable for the detection of analytes in several real media including water, soil extracts and biological fluids (blood and saliva) with high specificity, sensitivity (detection limits of nM, ppb level) and reliability. Stripping analysis at μITIES and micro-electrode arrays are two complementary approaches that have the advantages of being cost effective, simple to use and easily adaptable to field measurement. |
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Keywords: | 1 2-DCE 1 2-dichloroethane 1 6-DCH 1 6-dichlorohexane AdSV adsoptive stripping voltammetry ASV anodic stripping voltammetry BTPPA+ bis(triphenylphosphoranylidene)ammonium CSV cathodic stripping voltammetry ETH500 tetradodecylammonium tetrakis(4-chlorophenyl)borate ETH1062 N N N&prime N&prime -tetrabutyl-3 6-dioxaoctane-dithioamide ITIES interface between two immiscible electrolyte solution ITO indium tin oxide LOD limit of detection NB nitrobenzene NPOE 2-nitrophenyloctyl ether ODTA+ octadecyltrimethylammonium PTE polyethylene terephthalate PVC polyvinyl chloride SWASV square wave anodic stripping voltammetry TBA+ tetrabutylammonium TPB&minus tetraphenylborate TPBCl&minus tetrakis(4-chlorophenyl)borate UPD underpotential deposition |
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