Effect of nano stripe carbonized-polymer electrode on high S/N ratio in electrochemical detection

This paper presents a scaling effect of the nano stripe electrode made of carbonized-polymer on the S/N ratio in electrochemical detections. It is well known that microelectrodes show higher sensitivity and higher S/N ratio. Downsizing of electrode, however, causes a reduction in signal current. Co-author has proposed a novel theoretical concept of a stripe electrode to solve this trade-off. The S/N ratio increases with downsizing the width of the stripe electrode because the noise current exponentially decreases. The nano stripe electrode with 450 nm in width and 15 mum in the center-to-center separation of the electrode could achieve 17.15 times higher S/N ratio than that of a planar electrode having the same corresponding area size. Furthermore, comparisons of experimental and theoretical S/N ratios will be discussed.