Array of gold nanoelectrodes from nanoporous block copolymer films for electrochemical sensing
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Nanoelectrode and its array in electrochemical applications can provide greater advantages compared with its corresponding planar or micro-electrodes due to the enhanced mass transport by the dominance of radial diffusion. As a sensor, both sensitivity and selectivity can be improved in nanoelectrodes to yield enhanced nanoscale electrochemical measurement. The fabrication of nanoelectrode arrays has attracted increasing attention, and has been done by applying various techniques. In this work, we seek to fabricate the nanoporous membranes from the self-assembly of block copolymers (BCPs) and make full use of nanoelectrodes for electrochemical dopamine sensing. The morphologies of the membranes were characterized by AFM and SEM, and the electrochemical analysis of nanoelectrodes from nanoporous membranes were done by cyclic voltammetry measurements. Electrochemical techniques in terms of BCP thin films offer simplicity, rapidity, relative low-cost and high-sensitivity.