The invention concerns a device for taking essentially two-dimensional plane material sections, a tensioning device to tension an energy storage means as well as a system for tensioning an energy storage means. It also concerns a method of taking essentially two-dimensional plane material sections.The device (10) for taking essentially two-dimensional plane material sections (11), in particular for taking skin tissue sections, comprises a fixation means (20) to be fixed to a surface of a material. The fixation means (20) comprises a fixation area (21) extending in a first plane (91). The device also comprises a support means (30) to be arranged adjacent to the fixation means (20) on the surface of the material and a movement means to realize a relative movement (200) of the fixation means (20) and the support means (30) in relation to each other essentially perpendicular to the first plane (91), so that a spacing (94) between a fixed material surface (12) fixed to the fixation means (20) and at least a section of its adjacent material surface (13) is achievable. The device further comprises a separation means (50) to achieve a separation operation (300) in a second plane (92) essentially parallel to the first plane (91), and an adjustment means adapted for adjusting the distance (95) between the first plane (91) and the second plane (92).
