Abstract: The invention relates to a method for attaching nucleic acids to a platinum electrode, comprising the following steps: —a step (S1) of attaching an ethylenediamine molecule to the electrode, step (S1) comprising electro-oxidation of a primary amine from the ethylenediamine molecule by cyclic voltammetry, —a step (S2) of attaching a sulfo SMCC molecule of 4-(N-maleimidomethyl)cyclohexane-1-carboxylic acid 3-sulfo-N-hydroxysuccinimide ester to the ethylenediamine molecule, —a step (S3) of attaching a nucleic acid to the sulfo SMCC molecule, the nucleic acid having been modified beforehand to comprise a thiol function, the electrode being in contact with an aqueous solution, i.e. with a solution in which the solvent is water, during steps (S1), (S2) and (S3).

Abstract: A process for pre-concentration and detection of at least one single-stranded nucleic acid target molecule, the process comprising the steps of generating a flow of liquid comprising at least one magnetic nanoparticle in a micro-channel and a plurality of single-stranded nucleic acid probe molecules attached to the nanoparticle, generating an alternating magnetic field in the part of the micro-channel using an electromagnet, the magnetic field having an intensity and frequency that are suitable for causing magnetic hyperthermia of the nanoparticles so as to cause denaturing of the duplex formed by the single-stranded nucleic acid target molecule and the single-stranded nucleic acid probe molecule, and detecting the single-stranded target molecule dispersed in the liquid.

Abstract: The invention relates to a process for pre-concentration and detection of at least one single-stranded nucleic acid target molecule, the process comprising steps of generating a flow of liquid comprising at least one magnetic nanoparticle in a micro-channel and a plurality of single-stranded nucleic acid probe molecules attached to the nanoparticle, of generating an alternating magnetic field in the part of the micro-channel by means of the electromagnet, the magnetic field having an intensity and frequency that are suitable for causing magnetic hyperthermia of the nanoparticles so as to cause denaturing of the duplex formed by the single-stranded nucleic acid target molecule and the single-stranded nucleic acid probe molecule, and detection of the single-stranded target molecule dispersed in the liquid.

Abstract: The present invention relates to a microfluidic analysis device (1) including: a substrate (20) wherein a separation channel (10) is arranged, in which an electrolyte flows, a portion of the separation channel (10) being covered with a polarizable surface (11); two longitudinal field electrodes (8a, 8b) arranged on either side of the separation channel (10); at least one control electrode (6a, 6b) positioned in the separation channel (10), the control electrode (6a, 6b) being suitable for polarizing the polarizable surface (11) so as to control the speed of the electro-osmotic flow in the separation channel (10); the microfluidic analysis device (1) being characterised in that the polarizable surface (11) includes an insulating sub-layer (12) made of amorphous silicon carbide (SiC) and an upper polarizable layer (13) in direct contact with the electrolyte, the control electrodes (6a, 6b) being positioned between the insulating sub-layer (12) and the upper polarizable layer (13).

Abstract: The present invention relates to a microfluidic analysis device (1) including: a substrate (20) wherein a separation channel (10) is arranged, in which an electrolyte flows, a portion of the separation channel (10) being covered with a polarisable surface (11); two longitudinal field electrodes (8a, 8b) arranged on either side of the separation channel (10); at least one control electrode (6a, 6b) positioned in the separation channel (10), the control electrode (6a, 6b) being suitable for polarising the polarisable surface (11) so as to control the speed of the electro-osmotic flow in the separation channel (10); the microfluidic analysis device (1) being characterised in that the polarisable surface (11) includes an insulating sub-layer (12) made of amorphous silicon carbide (SiC) and an upper polarisable layer (13) in direct contact with the electrolyte, the control electrodes (6a, 6b) being positioned between the insulating sub-layer (12) and the upper polarisable layer (13).