| abstract |
A method of forming an aggregate (20) of objects (O) in a microchannel (2) comprising a liquid (L), said method comprising: a) providing objects (O) in at least one region of the microchannel (2) , and b) forming an aggregate (20) of said objects (O) by subjecting them to a modulated pulsed acoustic field, in which the modulated pulsed acoustic field applied in step b) is amplitude modulated, the Reynolds number of the flow being preferably 10 or less during stage b), the objects being rigid or deformable particles, polydisperse particles, biological cells, bacteria, colloidal or non-colloidal emulsions, proteins or liposomes. |