Electro-chemical and biological properties of carbon nanotube based multi-electrode arrays

Tamir Gabay*, Moti Ben-David, Itshak Kalifa, Raya Sorkin, Ze'ev R. Abrams, Eshel Ben-Jacob, Yael Hanein

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A novel class of micro-electrodes was fabricated by synthesizing high density carbon nanotube islands on lithographically defined, passivated titanium nitride conductors on a silicon dioxide substrate. Electrochemical characterization in phosphate buffered saline of these new electrodes reveals superb electrochemical properties marked by featureless rectangular cyclic voltammetry curves corresponding to a DC surface specific capacitance and a volume specific capacitance as high as 10mFcm-2 and 10Fcm -3, respectively. These electrodes are also characterized by a slowly varying impedance magnitude over the range of 1Hz to 20kHz. High fidelity extracellular recordings from cultured neurons were performed and analysed to validate the effectiveness of the fabricated electrodes. The enhanced electrochemical properties of the electrodes, their flexible and simple micro-fabrication preparation procedure as well as their bio-compatibility and durability suggest that carbon nanotube electrodes are a promising platform for high resolution capacitive electrochemical applications.

Original languageEnglish
Article number035201
Issue number3
StatePublished - 24 Jan 2007


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