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

Sensors

Raphael Kiran⁵  Lionel Rousseau²  Gaëlle Lissorgues²  Emmanuel Scorsone⁵  Alexandre Bongrain²  Blaise Yvert⁴  Serge Picaud¹  Pascal Mailley³ 

[1] INSERM, U968, Institut de la Vision, Paris 75012, France; E-Mail:;Université Paris Est, ESYCOM EA2552, ESIEE Cité Descartes, BP99, Noisy Le Grand 93162, France; E-Mails:;CEA-LITEN-DTS, Laboratoire de Stockage de l'Electricité, Le Bourget du Lac 73377, France; E-Mail:;Institut des Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), Université de Bordeaux, UMR 5287, Bordeaux 33000, France; E-Mail:;CEA-LIST, Diamond Sensors Laboratory, Gif-sur-Yvette 91191, France; E-Mails:

关键词: ultramicroelectrode;    boron doped diamond;    electrochemical impedance spectroscopy;    biosensor array;    statistical study of microelectrode arrays;   

DOI  :  10.3390/s120607669

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland