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Article Dans Une Revue Measurement Sience and Technology Année : 2006

Development of an ordered microarray of electrochemiluminescent nanosensors

Résumé

A microarray of electrochemiluminescent (ECL) nanosensors for remote detection is reported. Such nanosensor arrays were created on the distal face of coherent optical fibre bundles by adapting near-field optical probe and nanoelectrode methodologies. The fabrication process allows the production of high-density microarrays of nanosensors where each optical aperture is surrounded by a gold nanoring electrode. The initial architecture of the optical fibre bundle is retained and thus the microarray keeps its imaging properties. The electrochemical response of the array displays a steady-state current. This feature indicates that the nanoelectrodes forming the array can be considered as diffusively independent. In other words, each ring-shaped electrode of the array probes electrochemically a different micro-environment. We also show that this microdevice can be used as an ECL nanosensor microarray. Indeed, ECL light is initiated by the gold nanoring electrode in the presence of a co-reactant biospecies, NADH. A fraction of the isotropically electrochemically generated light is collected by the same aperture, transmitted by the corresponding fibre core and eventually imaged by a CCD camera. The gold coating therefore acts as an electrode material and also to confine the ECL light in each etched core. Such nanostructured microdevice integrates ECL-light generation, collection and imaging in a microarray format.

Dates et versions

hal-00579843 , version 1 (25-03-2011)

Identifiants

Citer

Arnaud Chovin, Patrick Garrigue, Gilles Pécastaings, Hassan Saadaoui, Neso Sojic. Development of an ordered microarray of electrochemiluminescent nanosensors. Measurement Sience and Technology, 2006, 17 (5), pp. 1211-1219. ⟨10.1088/0957-0233/17/5/S45⟩. ⟨hal-00579843⟩
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