Origins of nanoscale damage to glass-sealed platinum electrodes with submicrometer and nanometer size.

ABSTRACT: Glass-sealed Pt electrodes with submicrometer and nanometer size have been successfully developed and applied for nanoscale electrochemical measurements such as scanning electrochemical microscopy (SECM). These small electrodes, however, are difficult to work with because they often lose a current response or give a low SECM feedback in current-distance curves. Here we report that these problems can be due to the nanometer-scale damage that is readily and unknowingly made to the small tips in air by electrostatic discharge or in electrolyte solution by electrochemical etching. The damaged Pt electrodes are recessed and contaminated with removed electrode materials to lower their current responses. The recession and contamination of damaged Pt electrodes are demonstrated by scanning electro

SUBMITTER: Nioradze N 

PROVIDER: S-EPMC3727625 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature