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Diamond-Like Carbon Films for Electrochemical Sensor

  • A. Zeng*
  • , E. Liu
  • , S. Zhang
  • , S. N. Tan
  • , L. X. Liu
  • , J. Gao
  • *Corresponding author for this work
  • Nanyang Technological University

Research output: Contribution to journalConference articlepeer-review

Abstract

In this paper, conductive nitrogen doped diamond-like carbon (N-DLC) films were deposited with dc magnetron sputtering, and their performance in acids as well as application as working electrodes for lead stripping analysis had been studied. It was found that N-DLC film has a double-layer capacitance about 3.45 μF·cm-2 in 0.5 M H2SO4, a wide potential window in acids, and a high catalytic activity for Cl 2/Cl-. The N-DLC electrodes also had a high signal of Pb2+/Pb0, and their stripping detection limit without mercury coating was about 76 nM in 0.1 M KCl (pH1) solution. Their double layer capacitance, width of potential window, and stripping detection limit are comparable with that of boron doped diamond film electrodes. N-DLC film has shown to be a suitable work electrode material for electrochemical sensors.

Original languageEnglish
Pages (from-to)467-470
Number of pages4
JournalMaterials Science Forum
Volume437-438
DOIs
StatePublished - 2003
Externally publishedYes
EventProceedings of the 2nd International Conference on Advanced Materials Processing - Singapore, Singapore
Duration: 2 Dec 20024 Dec 2002

Keywords

  • Diamond-Like Carbon Film
  • Electrochemical Characteristics
  • Electrode
  • Nitrogen Doping

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