Fabrication and characterization of a nanometer-sized optical fiber electrode based on selective chemical etching for scanning electrochemical/optical microscopy.

摘要: We have already reported a method for fabricating ultramicroelectrodes (Suzuki, K. JP Patent, 2004-45394, 2004). This is based on the selective chemical etching of optical fibers. In this work, we undertake detailed investigation involving combination etched fibers with various types tapered tip (protruding-shape, double- (or pencil-) shape and triple-tapered electrode) insulation electrophoretic paint. Our goal to establish nanometer-sized fiber electrodes high reproducibility. As result, realized pencil-shaped that had radii in nanometer range These showed well-defined sigmoidal curves stable diffusion-limited responses cyclic voltammetry. The fiber, which has conical cone angle 20°, was effective controlling electrode radius. higher reproducibility an...