無電解ニッケルめっきを用いた微小ディスク電極プローブの作製

抄録

Fabrication of the micro-disk electrode probe, which is convenient for micro-electrochemistry of localized surfaces or in small amounts of solution, has required special equipment or technical skills. In order to fabricate a micro-disk electrode probe simply, nickel electroless plating in a glass pipette was applied. After activation of the inside of a glass pipette heated and pulled off, nickel electroless-plating solution was successively introduced to deposit nickel in the pipette. Polishing the tip of the pipette and/or electroplating Ni, Cu or Pt obtained a disk surface with a diameter less than a few tens of micrometers. Cyclic voltammetry of the disk electrode showed a sigmoid curve and gave a limiting current which was identical with the theoretical value as a micro-disk electrode, indicating that this method was promising for fabrication of micro-disk electrodes. The electroless-plating micro-disk electrode was employed as a probe for scanning electrochemical microscopy to demonstrate its performance.