(a) Schematics of borophene growth. (b) STM topography pictures displaying striped-phase atomic-scale structure. (c) The sheets with striped phase and (d) homogeneous phase. Reprinted with permission from Ref. [25
]. Copyright 2015 American Association for the Advancement of Science. (e) STM topography of β12
borophene, the atomic structure diagram of β12
borophene. (f) STM topography and atomic structure model of χ
3 borophene. Reprinted with permission from Ref. [73
]. Copyright 2019 American Chemical Society. (g) 3D STM topographic image. Reprinted with permission from Ref. [71
]. Copyright 2016 Springer Nature Limited.