Cylindrical Nanocavity and Nanowire Electrodes for Redox Cycle Dopamine Sensing: Design, Fabrication, and Characterization

摘要

We investigated the use of a three dimensional, cylindrical nanocavity structure with two working electrodes for use in dopamine sensing using redox cycling. This method of dopamine detection has been an active area of research for many years, with sensor designs developing to smaller and smaller sizes, as detection limits approach those needed for an in vivo dopamine detector. Toward that end, the nanocavity structure, based around a field of vertically oriented nanowires, was conceived, fabricated, and tested for feasibility. Each nanowire serves as one of the working electrodes, while the second is formed as a semi-enclosing cylindrical shell, with an inter-electrode spacing of 2um.