147 articles – 175 Notices  [english version]
Fiche détaillée Communications avec actes
Proc. Eurosensors XXV, Athènes : Grèce (2011)
Photopotential Imaging on Functionalized Surfaces Dedicated to Label-Free Detection of Biomolecular Interactions
A. Charrier1, Y. Chevolot1, .J.-P. Cloarec1, A. Goudot1, T. Géhin1, C. Roux1, V. Dugas2, S. Vidal3, J.-J. Vasseur4, F. Morvan4, E. Souteyrand1

We present a label-free biosensor capable to map local potential by photogenerating charge carriers in a field effect device. It consists in an amplitude-modulated laser beam scanning through an electrolyte/insulator/semiconductor structure at very low illumination around the equilibrium state of semiconductor. A proof of principle is demonstrated by depositing a self-assembled monolayer on the dielectric and by showing a clear photopotential change between naked and covered areas.
1 :  INL - Institut des nanotechnologies de Lyon - Site d'Ecully
2 :  Laboratoire des Sciences Analytiques
3 :  ICBMS - Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
4 :  IBMM - Institut des Biomolécules Max Mousseron
* Label-free biosensor – * photopotential imaging – * photogeneration – * field effect – * electrochemical impedance