A vibrating membrane working electrode for highly sensitive anodic stripping voltammetry

Tianyi Zhang, Qingyuan Liu, Xueyong Wei, Zhuangde Jiang, Tianhong Cui

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Anodic stripping voltammetry (ASV) is an effective electrochemical method for quantitative determination of ions in solution. In this work, we present a new vibrating working electrode for the ASV detection of copper ion. This working electrode is a thin multilayer membrane consisting of a gold film working electrode evaporated on a piezoelectric resonant diaphragm. Chemical vapor deposition and electron beam evaporation methods are used to form multiple functional layers in the membrane. Vibrational and electrochemical properties of the membrane working electrode are experimentally investigated. In the ASV measurement, the vibration of the piezoelectric diaphragm can enhance the mass transfer rate during the metal deposition step. The sensitivity of sensors under vibration is improved by 4 times, compared with those at static conditions. The detection limit with and without vibration are 0.37 and 1.66 μg/L respectively at a deposition time of 5 min. In addition, the experimental results in this study also indicate the stripping peak current is influenced by the vibrating velocity and mode shape of the piezoelectric diaphragm. The vibrating membrane electrode presented in this study can be potentially used to different types of electrochemical sensing applications limited by the mass transfer rate of the analyte.

Original languageEnglish (US)
Article number127948
JournalSensors and Actuators, B: Chemical
Volume311
DOIs
StatePublished - May 15 2020

Bibliographical note

Funding Information:
Portions of this work were conducted in the Minnesota Nano Center, which is supported by the National Science Foundationthrough the National Nano Coordinated Infrastructure Network (NNCI) under Award Number ECCS-1542202. We also appreciate discussion with Professor Terrence W. Simon on our experimental results.

Funding Information:
Portions of this work were conducted in the Minnesota Nano Center, which is supported by the N ational Science Foundation through the National Nano Coordinated Infrastructure Network (NNCI) under Award Number ECCS-1542202. We also appreciate discussion with Professor Terrence W. Simon on our experimental results.

Publisher Copyright:
© 2020

Keywords

  • Anodic stripping voltammetry
  • PVDF
  • Piezoelectric
  • Vibrating electrode

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