Patent ID: 8334702

Claim:
Microdevice for an in situ detection of particles of interest in a fluid medium, characterized in that it comprises: i) a nanowire configured for interacting with the particles of interest, having a length (L) and a width (Z), said nanowire being suspended between two anchors and having a mechanical resonance frequency (ω 0 ), the anchors defining a source and a drain, the source being connected to a first voltage generator (generating an AC voltage with a first angular frequency (ω LO ) and the drain being connected to a voltage generator for generating a DC voltage (V SD ), in order to generate a first input signal; ii) an excitation electrode, placed laterally and facing the nanowire, said first electrode being connected to a second voltage generator for generating an AC voltage (v RF ) with a second angular frequency (ω RF ), in order to generate a second input signal; and iii) a measurement electrode placed laterally and facing the nanowire, on the opposite side from the excitation electrode relative to the nanowire and generating an output signal representative of the particles of interest.