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Sensors 2012, 12(6), 7669-7681; doi:10.3390/s120607669
Article

Multichannel Boron Doped Nanocrystalline Diamond Ultramicroelectrode Arrays: Design, Fabrication and Characterization

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Received: 24 April 2012 / Revised: 23 May 2012 / Accepted: 4 June 2012 / Published: 7 June 2012
(This article belongs to the Section Biosensors)
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Abstract

We report on the fabrication and characterization of an 8 × 8 multichannel Boron Doped Diamond (BDD) ultramicro-electrode array (UMEA). The device combines both the assets of microelectrodes, resulting from conditions in mass transport from the bulk solution toward the electrode, and of BDD’s remarkable intrinsic electrochemical properties. The UMEAs were fabricated using an original approach relying on the selective growth of diamond over pre-processed 4 inches silicon substrates. The prepared UMEAs were characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results demonstrated that the electrodes have exhibited a very fast electrode transfer rate (k0) up to 0.05 cm∙s−1 (in a fast redox couple) and on average, a steady state limiting current (in a 0.5 M potassium chloride aqueous solution containing 1 mM Fe(CN)64− ion at 100 mV∙s−1) of 1.8 nA. The UMEAs are targeted for electrophysiological as well as analytical applications.
Keywords: ultramicroelectrode; boron doped diamond; electrochemical impedance spectroscopy; biosensor array; statistical study of microelectrode arrays ultramicroelectrode; boron doped diamond; electrochemical impedance spectroscopy; biosensor array; statistical study of microelectrode arrays
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kiran, R.; Rousseau, L.; Lissorgues, G.; Scorsone, E.; Bongrain, A.; Yvert, B.; Picaud, S.; Mailley, P.; Bergonzo, P. Multichannel Boron Doped Nanocrystalline Diamond Ultramicroelectrode Arrays: Design, Fabrication and Characterization. Sensors 2012, 12, 7669-7681.

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