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Field Emission Characterization of MoS2 Nanoflowers

1
CNR-SPIN Salerno, via Giovanni Paolo II n. 132, 84084 Fisciano, Italy
2
Physics Department “E. R. Caianiello”, University of Salerno, via Giovanni Paolo II n. 132, 84084 Fisciano, Italy
3
Department of Physical and Chemical Science, University of L’Aquila, via Vetoio, Coppito, 67100 L’Aquila, Italy
4
WMG, International Manufacturing Centre, University of Warwick, Coventry CV4 7AL, UK
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(5), 717; https://doi.org/10.3390/nano9050717
Received: 5 April 2019 / Revised: 30 April 2019 / Accepted: 6 May 2019 / Published: 9 May 2019
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Abstract

Nanostructured materials have wide potential applicability as field emitters due to their high aspect ratio. We hydrothermally synthesized MoS2 nanoflowers on copper foil and characterized their field emission properties, by applying a tip-anode configuration in which a tungsten tip with curvature radius down to 30–100 nm has been used as the anode to measure local properties from small areas down to 1–100 µm2. We demonstrate that MoS2 nanoflowers can be competitive with other well-established field emitters. Indeed, we show that a stable field emission current can be measured with a turn-on field as low as 12 V/μm and a field enhancement factor up to 880 at 0.6 μm cathode–anode separation distance. View Full-Text
Keywords: transition metal dichalcogenides; MoS2; nanoflower; field emission transition metal dichalcogenides; MoS2; nanoflower; field emission
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Giubileo, F.; Grillo, A.; Passacantando, M.; Urban, F.; Iemmo, L.; Luongo, G.; Pelella, A.; Loveridge, M.; Lozzi, L.; Di Bartolomeo, A. Field Emission Characterization of MoS2 Nanoflowers. Nanomaterials 2019, 9, 717.

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