Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 3, Pages 438-441Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.01.014
Keywords
Boron-doped diamond nanowires; Tryptophan; Electrochemical sensor
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The paper reports on the fabrication and electrochemical investigation of boron-doped diamond nanowires (BDD NWs) electrodes. The nanowires were obtained directly from highly doped polycrystalline diamond substrates using reactive ion etching (RIE) with oxygen plasma. The technique does not require any complicated processing steps such as mask deposition or template removal. The influence of the surface state on the electrochemical characteristics is discussed. The interface with the most favourable electrochemical response is investigated for the detection of tryptophan using differential pulse voltammetry. A detection limit of 5 x 10(-7) M was obtained on oxidized BDD NWs, as compared to 1 x 10(-5) M recorded on planar oxidized boron-doped diamond interfaces. (C) 2010 Elsevier B.V. All rights reserved.
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