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Title: Metallic few-layer flowerlike VS2 nanosheets as field emitters
Authors: Rout C.S.
Khare R.
Kashid R.V.
Joag D.S.
More M.A.
Lanzillo N.A.
Washington M.
Nayak S.K.
Late D.J.
Keywords: Density functional calculations
Field emission
Layered compounds
Issue Date: 2014
Citation: 37
Abstract: We report first-principles DFT calculations of the single-layer VS2 work function, the experimental synthesis of flower-like few-layer-thick VS2 nanosheets by a simple one-step hydrothermal method, and the investigation of their field emission properties. The turn-on field required to draw emission current densities of 1 and 10 ?A/cm2 were 4 and 5.01 V/?m, respectively. The observed turn-on field values are attributed to the high field enhancement factor (ca. 2500), which is due to presence of sharp protrusions in the VS2 nanosheets. Furthermore, the field-emission current stability of the VS2 emitter shows stable behavior over a period of 12 h. Further, DFT calculations show that the work function (f) of the single-layer VS2 emitter is 6.01 eV. � 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Appears in Collections:Research Publications

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