The invention relates to a microfluidic flow cell (100), the flow cell (100) having electrodes (210, 220) for generating an electrical field in an interior (140) of the flow cell (100), the interior (140) being at least partially covered by a elastic layer (130) is limited, a recess (150) for exerting pressure on the layer (130) being located on a side (131) of the layer (130) facing away from the interior (140), so that depending on the exertion of pressure there is a recess Part (135) of the layer (130) for a local change of the electric field in the interior (140) expands. The invention further relates to a method (600) for generating an electrical field in an interior (140) of the flow cell (100).
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