Acta Phys. -Chim. Sin. ›› 1993, Vol. 9 ›› Issue (04): 528-532.doi: 10.3866/PKU.WHXB19930419

• ARTICLE • Previous Articles     Next Articles

Diffusion Limiting Currents at Band-Band and Band-Plane Electrodes

Liu Xiao-Ping; Lu Jun-Tao; Cha Quan-Xing   

  1. Department of Chemistry, Wuhan University, Wuhan 430072
  • Received:1992-01-27 Revised:1992-10-04 Published:1993-08-15
  • Contact: Liu Xiao-Ping

Abstract: Expressions for diffusion limiting currents at a microband electrode paired with a planar electrode of conventional size and with another microband electrode are derived analytically by conformal mapping. It is shown that the diffusion limiting currents depend on the microband electrode width L and the interelectrode gap width d, and they can be expressed as the ratio of the two complete elliptic functions K((square root(1-k~2)~(1/2))) and K(k), where k=(1+2L/d)~(-1) for band electrode pairs and k=(1+L/d)~(-1/2) for the band electrode near a planar electrode of conventional size.

Key words: Band-band electrode, Band-plane electrode, Stendy-state diffusion limiting current