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Title: Ab initio studies of phoshorene island single electron transistor
Authors: Ray S.J.
Venkata Kamalakar M.
Chowdhury, Rajib
Published in: Journal of Physics Condensed Matter
Abstract: Phosphorene is a newly unveiled two-dimensional crystal with immense potential for nanoelectronic and optoelectronic applications. Its unique electronic structure and two dimensionality also present opportunities for single electron devices. Here we report the behaviour of a single electron transistor (SET) made of a phosphorene island, explored for the first time using ab initio calculations. We find that the band gap and the charging energy decrease monotonically with increasing layer numbers due to weak quantum confinement. When compared to two other novel 2D crystals such as graphene and MoS2, our investigation reveals larger adsorption energies of gas molecules on phosphorene, which indicates better a sensing ability. The calculated charge stability diagrams show distinct changes in the presence of an individual molecule which can be applied to detect the presence of different molecules with sensitivity at a single molecular level. The higher charging energies of the molecules within the SET display operational viability at room temperature, which is promising for possible ultra sensitive detection applications. ¬© 2016 IOP Publishing Ltd.
Citation: Journal of Physics Condensed Matter(2016), 28(19): -
Issue Date: 2016
Publisher: Institute of Physics Publishing
Keywords: density functional theory
first-principles calculation
gas sensor
phosphorene sensor
single electron transistor
ISSN: 9538984
Author Scopus IDs: 55843572100
Author Affiliations: Ray, S.J., Department of Physics, Indian Institute of Technology Patna, Bitha, Bihar, 801 103, India
Venkata Kamalakar, M., Department of Physics and Astronomy, Uppsala University, PO Box 516, Uppsala, 75120, Sweden
Chowdhury, R., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Funding Details: The authors would like to thank Dr L Kou from the Queensland University of Technology, Australia for useful discussions
Appears in Collections:Journal Publications [CE]

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