Microfluidic device and method for batch adsorption

The invention relates to a fluidic device (1) having a particle trap functionality for a particle (2) in a fluid, the fluidic device (1) comprising a first fluid flow channel (11), a second fluid flow channel (12), and a control channel (13), wherein the first fluid flow channel (11) is in fluid contact with the second fluid flow channel (12) and intersects the second fluid flow channel (12) at an intersection (14), wherein the control channel (13) at the location of the intersection (14) is arranged adjacent to the first fluid flow channel (11) and separated by a flexible membrane (17) from the intersection (14), wherein the flexible membrane (17) is configured as a valve (31), configured in operation at a first pressure in the control channel (13) in a first position not to block propagation of a particle (2) of a predetermined size in the first fluid flow channel (11), and at a second pressure in the control channel (13) in a second position to block with said flexible membrane (17) propagation of said particle (2) through the first fluid flow channel (11), while in this second position not fully blocking fluid flow through the first fluid flow channel (11) wherein the valve (31) is configured to provide in said second position a gradual increasing blockade of a cross sectional area (19) of the first fluid flow channel (11) in a direction parallel to a longitudinal axis of the first fluid flow channel (11).