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

作者：Kiran Raphael^*; Rousseau Lionel; Lissorgues Gaelle; Scorsone Emmanuel; Bongrain Alexandre; Yvert Blaise; Picaud Serge; Mailley Pascal; Bergonzo Philippe

来源：Sensors (Switzerland), 2012, 12(6): 7669-7681.

DOI：10.3390/s120607669

• ultramicroelectrode
• boron doped diamond
• electrochemical impedance spectroscopy
• biosensor array
• statistical study of microelectrode arrays

We report on the fabrication and characterization of an 8 x 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 (k(0)) 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)(6)(4-) ion at 100 mV.s(-1)) of 1.8 nA. The UMEAs are targeted for electrophysiological as well as analytical applications.

• 出版日期2012-6
• 单位中国地震局