Fabrication of Nanometer-Sized Electrodes and Tips for Scanning Electrochemical Microscopy
- 22 September 2001
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 73 (21), 5346-5351
- https://doi.org/10.1021/ac010474w
Abstract
A novel method for fabrication of nanometer-sized electrodes and tips suitable for scanning electrochemical microscopy (SECM) is reported. A fine etched Pt wire is coated with polyimide, which was produced by polymerization on the Pt surface initiated by heat. This method can prepare electrodes with effective radii varying from a few to hundreds of nanometers. Scanning electron microscopy, cyclic voltammetry, and SECM were used to characterize these electrodes. Well-defined steady-state voltammograms could be obtained in aqueous or in 1,2-dichloroethane solutions. This method produced the nanoelectrodes with exposed Pt on the apex, and they can also be employed as the nanotips for SECM investigations. Different sizes of Pt nanotips made by this method were employed to evaluate the kinetics of the redox reaction of Ru(NH3)63+ on the surface of a large Pt electrode by SECM, and the standard rate constant κ0 of this system was calculated from the best fit of the SECM approach curve. This result is similar to the values obtained by analysis of the obtained voltammetric data.Keywords
This publication has 26 references indexed in Scilit:
- Electroanalytical measurements using the scanning electrochemical microscopeAnalytica Chimica Acta, 2000
- 67Zn QCPMG Solid-State NMR Studies of Zinc Complexes as Models for MetalloproteinsJournal of the American Chemical Society, 1999
- Microelectrodes for the Measurement of Catecholamines in Biological SystemsAnalytical Chemistry, 1996
- Coadsorption of alkalis and hydrogen on W(100)Journal of Vacuum Science & Technology A, 1995
- Rapid and Selective Cyclic Voltammetric Measurements of Epinephrine and Norepinephrine as a Method To Measure Secretion from Single Bovine Adrenal Medullary CellsAnalytical Chemistry, 1994
- Scanning Electrochemical Microscopy. 25. Application to Investigation of the Kinetics of Heterogeneous Electron Transfer at Semiconductor (WSe2 and Si) ElectrodesThe Journal of Physical Chemistry, 1994
- In situ scanning tunneling microscopy as a probe of adsorbate-induced reconstruction at ordered monocrystalline electrodes: carbon monoxide on platinum(100)The Journal of Physical Chemistry, 1991
- Vibrating mirror surface plasmon resonance immunosensorAnalytical Chemistry, 1991
- Preparation and electrochemical characterization of conical and hemispherical ultramicroelectrodesAnalytical Chemistry, 1989
- Glassy carbon and graphite electrodes with a hole for long path length thin-layer spectroelectrochemistryAnalytical Chemistry, 1984