Microdevice for the in situ detection of particles of interest in a fluid medium and operating method

US8334702B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Vincent Agache · Saint-Égrève, FR
• Guillaume Delapierre · Le Pont-de-Claix, FR

Key dates

• Filing date: Mar 25, 2010
• Grant date: Dec 18, 2012
• Expiry date: Nov 18, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/122
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a detection device of small size, allowing direct in situ detection of particles with no labelling, enabling the particles to be rapidly analysed, and having both a specificity and a sensitivity that are at least equivalent to the existing devices. In one embodiment, the invention provides a device havinga nanowire, intended for interacting with the particles of interest, which is suspended between two anchors that define a source and a drain, the source and the drain are configured to be connected to an AC voltage generator and to a DC voltage generator, respectively, in order to generate a first input signal;an excitation electrode, placed laterally facing the nanowire and configured to be connected to an AC voltage generator, in order to generate a second input signal; anda measurement electrode placed opposite the excitation electrode relative to the nanowire and generating a single output signal representative of the particles of interest.