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Strain Releasing of Flexible 2D Electronics through van der Waals Sliding Contact

“…8−12 With atomic thin body thickness and a dangling-bond-free surface, 2D materials could be easily integrated on various elastic substrates 13−19 by a simple transfer process, without conventional structure matching and processing compatibility that plagues bulk crystals. Together with their higher carrier mobility and excellent transmittance, high-performance flexible devices have been demonstrated using 2D materials, including flexible transistors, 20,21 photodetectors, 22,23 solar cells, 24 light-emitting devices, 25 piezoelectric sensors, 26,27 gas sensors, 28,29 etc. However, similar to other inorganic crystals, the potential of 2D flexible devices is still limited by their low intrinsic flexibility, because each atom is covalently bonded within the layered plane.…”