Fabrication of a Microfluidic Device with Boron-doped Diamond Electrodes for Electrochemical Analysis

Takeshi Watanabe, Shuhei Shibano, Hideto Maeda, Ai Sugitani, Michinobu Katayama, Yoshinori Matsumoto, Yasuaki Einaga

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

A prototype microfluidic device using boron-doped diamond (BDD) electrodes patterned on an alumina chip was designed and fabricated. Electrochemical microfluidic devices have advantages in that the amount of sample required is small, the measurement throughput is high, different functions can be integrated on a single device, and they are highly durable. In using the device for the flow injection analysis of oxalic acid, the application of a brief conditioning step ensured that the reproducibility of the current signal was excellent.Furthermore, the fabricated system also performed as a prototype of "elimination-detection flow system", in which interfering species are eliminated using "elimination electrodes" prior to the species reaching the "detection electrode". The fabricated device reduced the current due to interfering species by 78%. Designs of devices to improve this efficiency are also discussed.

Original languageEnglish
JournalElectrochimica Acta
DOIs
Publication statusAccepted/In press - 2015 Sep 2

Keywords

  • Boron-doped diamond (BDD)
  • Electrochemical analysis
  • Electrodes
  • Microfluidic device

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

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