title: Multichannel boron doped nanocrystalline diamond ultramicroelectrode arrays: design, fabrication and characterization.
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 (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.
authors.affiliation: CEA-LIST, Diamond Sensors Laboratory, Gif-sur-Yvette 91191, France. raphael.kiran@cea.fr
authors.forename: Raphael
authors.initials: R
authors.lastname: Kiran
authors.forename: Lionel
authors.initials: L
authors.lastname: Rousseau
authors.forename: Gaëlle
authors.initials: G
authors.lastname: Lissorgues
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Scorsone
authors.forename: Alexandre
authors.initials: A
authors.lastname: Bongrain
authors.forename: Blaise
authors.initials: B
authors.lastname: Yvert
authors.forename: Serge
authors.initials: S
authors.lastname: Picaud
authors.forename: Pascal
authors.initials: P
authors.lastname: Mailley
authors.forename: Philippe
authors.initials: P
authors.lastname: Bergonzo