Anal. Chem. 2009, 81, 8571–8576
Amperometric Nitric Oxide Microsensor Based on Nanopore-Platinized Platinum: The Application for Imaging NO Concentrations Jun Ho Shim‡ and Youngmi Lee*,† Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea, and Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600 This paper reports an amperometric nitric oxide (NO) microsensor based on a cone-shaped nanopore-platinized Pt working electrode. The senor was fabricated using the following procedure: (1) a parent nanodisk electrode was prepared by polishing an etched Pt wire (radius ) 12.5 µm; dimension of etched tip end point
