Voltammetric characterisation of silicon-based microelectrode arrays and their application to mercury-free stripping voltammetry of copper ions
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Electrochemical sensors are of increasing importance in analytical chemistry due to their sensitivity, selectivity, fast and accurate analyses, portability and inexpensive cost . The applications for such sensors vary widely from environmental and medical diagnostics to biotechnology and food and beverage analysis . Improvements in electrochemical sensors include the development of modified electrodes (using chemical or biological recognition layers to improve the sensitivity and selectivity) and microelectrodes [3–5]. A microelectrode can be defined as an electrode in which at least one of its dimensions is in the m range  or an electrode with at least one dimension smaller than the diffusion length of the analyte .