Abstract: The present invention relates to a microfluidic chip capable of attracting and trapping a specific biological element, said chip comprising: a reservoir (1) consisting of a matrix comprising a chemoattractant compound capable of attracting the biological element, and at least one array of microchannels (2) arranged between the reservoir (1) and the external medium (3) of the chip and enabling the chemoattractant compound to pass towards said medium and the biological element present in said medium to pass towards the reservoir (1), characterized in that each microchannel is in the form of a harpoon comprising at least two arrows spaced apart longitudinally and directed towards the reservoir, in which each arrow comprises two branches each having a free end forming an acute angle of between 10° and 80°, and in which each arrow comprises two openings (7) communicating with a longitudinal part of the microchannel and having a width of between 5 ?m and 30 ?m.

Abstract: The present invention relates to a microfluidic chip for attracting and destroying a specific biological element, said chip comprising: a reservoir (1) consisting of a matrix comprising a chemoattractant compound capable of attracting the biological element at least one network of microchannels (2) arranged between the reservoir (1) and the external environment (3) of the chip and allowing the chemoattractant compound to pass to said environment and the biological element present in said environment to pass to the reservoir (1) at least one electrode (4) arranged between the reservoir (1) and the network of microchannels (2) or at the same location as the network of microchannels (2), said electrode (4) being capable of generating an electric field so as to destroy the biological element during its passage to the reservoir (1).

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).