Bio Sensors, Diagnostics & Imaging Chapter 1

Electrochemiluminescent sensor for clinical analysis based on Carbon Nanotube electrodes

Authors: A. Sanginario, D. Demarchi, M. Giorcelli, M. Castellino

Affilation: Politecnico di Torino, Italy

Pages: 110 - 113

Keywords: ECL, carbon nanotubes, Ruthenium, electrode, electrochemical sensor

Abstract:
Presented application is based on the use of carbon nanotubes (CNTs) for biomolecular analysis using electrochemiluminescence (ECL) detection technique. For this purpose we have grown self standing cylinder-shaped blocks of Multi wall CNTs (MWCNTs) by means of a catalytic chemical vapour deposition system, fed by gases formed in consequence of the co-evaporation of camphor (carbon precursor) and ferrocene (metal catalyst) in a nitrogen atmosphere. The blocks were subsequently back-contacted and encapsulated with polydimethylsiloxane (PDMS) as electrical insulator and sealant for their use as voltammetric electrodes. A ruthenium-complex solution was used as ECL label. The experiments show that by using MWCNTs electrodes it is possible to obtain a great increase in detection limit compared to usual Au electrodes and the reproducibility in ECL signal can be achieved.

ISBN: 978-1-4398-3415-2
Pages: 880
Hardcopy: $189.95