Fabrication and Electrochemical Characterizations of Strip Ultramicroelectrode Array Prepared by Nanoskiving

Strip ultramicroelectrodes (SUE) have been widely used in micro-nano manufacturing, trace element detection, and energy storage. Preparation of SUE is thus the basis for these applications. A method for the preparation of SUE and its array (SUEA) is proposed based on a nanoskiving technique. The effects of embedding materials and storage methods on electrode stability were investigated. The continuous and stable working time of 120 min and the storage time of 92 h were achieved. Furthermore, the effect of nanowire feature dimensions on the electrochemical properties of the SUE was analyzed. Parameters such as steady-state limiting current and reversible electron transfer were evaluated. Compared to SUE, the SUEA exhibits a ten-fold increase in steady-state limiting current. The findings in this study provide an approach to obtain high-performance SUE, which will promote the practical application of SUE in micro/nano electrochemical detection.