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In article 1802581, Zhongming Wei and co‐workers describe the layered crystal structure for a new 2D elemental semiconductor consisting of black arsenic (b‐As). The image also shows the Chinese character of the “As” element. The reported b‐As is more stable under ambient conditions than black phosphorous and could be obtained from natural mineral.
2D elemental layered crystals, such as graphene and black phosphorus (B‐P), have received tremendous attentions due to their rich physical and chemical properties. In the applications of nanoelectronic devices, graphene shows super high electronic mobility, but it lacks bandgap which impedes development in logical devices. As an alternative, B‐P shows high mobility of up to about 1000 cm2 V−1 s−1...
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