Phosphorene
Phosphorene structure: (a) tilted view, (b) side view, (c) top view. Red (blue) balls represent phosphorus atoms in the lower (upper) layer.[1]
Atomic force microscopy images of few-layer phosphorene sheets produced by ultrasonic exfoliation of black phosphorus in N-methyl-2-pyrrolidone and spin-coated onto a SiO2/Si substrate.[2]
Phosphorene is an allotrope of phosphorus. It is normally used to designate a single layer of black phosphorus, although other allotropes have been predicted. Its two-dimensional structure makes it conceptually similar to the carbon-based graphene, hence the name phosphorene. However, phosphorene has substantially different electronic properties; in particular it possesses a nonzero fundamental band gap. This property makes phosphorene a semiconductor, different from graphene, which is a semimetal. As a semiconductor, it may be used to fabricate digital circuits. Phosphorene isolation was reported for the first time in 2014 by mechanical exfoliation. Liquid exfoliation of phosphorene, which is a potentially scalable process, was reported in the same year.[2]
See also
References
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- ↑ Ezawa, M. (2014). "Topological origin of quasi-flat edge band in phosphorene". New Journal of Physics 16 (11): 115004. doi:10.1088/1367-2630/16/11/115004.
- ↑ 2.0 2.1 Brent, J. R.; Savjani, N.; Lewis, E. A.; Haigh, S. J.; Lewis, D. J.; O'Brien, P. (2014). "Production of few-layer phosphorene by liquid exfoliation of black phosphorus". Chem. Commun 50 (87): 13338. doi:10.1039/C4CC05752J.
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