The present application is based on the use of carbon nanotubes (CNTs) for biomolecular analysis using electro- chemiluminescence (ECL) detection technique [1]. 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 camphor and ferrocene gases. The blocks were subsequently back-contacted and encapsulated into epoxy resin as electrical insulator and sealant, for their use as voltammetric electrodes. A ruthenium-complex solution has been used as ECL label. It has been observed a periodical light emission that lasts for hundreds of cycles, likely due to the CNTs struc- ture. Thanks to a data-processing algorithm which exploits this behavior, the experiments show that it is possible to obtain a great increase in detection limit as compared to the common working metal electrodes (for example Au or Pt).

Carbon nanotube electrodes for electrochemiluminescence biosensors / Sanginario, Alessandro; Demarchi, Danilo; Civera, Pierluigi; Giorcelli, Mauro; Castellino, Micaela; Tagliaferro, Alberto. - In: PROCEDIA ENGINEERING. - ISSN 1877-7058. - ELETTRONICO. - 5:(2010). ((Intervento presentato al convegno EuroSensors XXIV tenutosi a Linz nel 5-8 September 2010.

Carbon nanotube electrodes for electrochemiluminescence biosensors

SANGINARIO, ALESSANDRO;DEMARCHI, DANILO;CIVERA, PIERLUIGI;GIORCELLI, MAURO;CASTELLINO, MICAELA;TAGLIAFERRO, Alberto
2010

Abstract

The present application is based on the use of carbon nanotubes (CNTs) for biomolecular analysis using electro- chemiluminescence (ECL) detection technique [1]. 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 camphor and ferrocene gases. The blocks were subsequently back-contacted and encapsulated into epoxy resin as electrical insulator and sealant, for their use as voltammetric electrodes. A ruthenium-complex solution has been used as ECL label. It has been observed a periodical light emission that lasts for hundreds of cycles, likely due to the CNTs struc- ture. Thanks to a data-processing algorithm which exploits this behavior, the experiments show that it is possible to obtain a great increase in detection limit as compared to the common working metal electrodes (for example Au or Pt).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2499873
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