Prototypical Nonelectrochemical Methodfor Surface Regeneration of an IntegratedElectrode in a PDMS Microfluidic Chip

摘要

A prototypical method for surface regeneration of an integratedelectrode in a microfluidic chip is demonstrated. A platinum wire as workingelectrode was mounted in a polydimethylsiloxane chip vertical to the chip throughthe channel. The regeneration of the electrode was easily achieved by drawing theplatinum wire out for 5 mm, because the area exposed to the channel or thestream would be altered. With continuous motion, the wire electrode can main-tain a fresh surface just like a dropping mercury electrode. The current–time curveand open circuit potential (OCP) of dopamine solution show the performance ofthis prototypical system.