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 μm and 30 μm.