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. 2016 Nov 15;7:13352. doi: 10.1038/ncomms13352

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Copyright © 2016, The Author(s)

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(a) Raman spectra of bulk antimony (β-phase), few-layer antimonene and antimony trioxide. Inset: the vibrational modes of β-phase antimonene. (b) Raman spectra of antimonene polygons with thicknesses varying from 5 nm to bulk. (c) A_1g, E_g peak frequencies (left vertical axis) and the energy difference (right vertical axis) of those two peaks plotted against sample thickness. The energy difference between the A_1g and E_g peaks increases monotonically with sample thickness.