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Metallic Few‐Layer Flowerlike VS 2 Nanosheets as Field Emitters
Author(s) -
Rout Chandra Sekhar,
Khare Ruchita,
Kashid Ranjit V.,
Joag Dilip S.,
More Mahendra A.,
Lanzillo Nicholas A.,
Washington Morris,
Nayak Saroj K.,
Late Dattatray J.
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402448
Subject(s) - field electron emission , work function , common emitter , chemistry , hydrothermal circulation , field (mathematics) , layer (electronics) , current density , metal , nanotechnology , analytical chemistry (journal) , optoelectronics , chemical engineering , materials science , physics , mathematics , organic chemistry , quantum mechanics , chromatography , pure mathematics , engineering , electron
We report first‐principles DFT calculations of the single‐layer VS 2 work function, the experimental synthesis of flower‐like few‐layer‐thick VS 2 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 μA/cm 2 were 4 and 5.01 V/μm, 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 VS 2 nanosheets. Furthermore, the field‐emission current stability of the VS 2 emitter shows stable behavior over a period of 12 h. Further, DFT calculations show that the work function ( f ) of the single‐layer VS 2 emitter is 6.01 eV.