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Transport and Field Emission Properties of MoS2 Bilayers

Department of Physics “E.R. Caianiello”, University of Salerno, 84084 Fisciano, Italy
CNR-SPIN Salerno, 84084 Fisciano, Italy
Department of Physical and Chemical Sciences, University of L’Aquila, and CNR-SPIN L’Aquila, 67100 L’Aquila, Italy
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(3), 151;
Received: 9 February 2018 / Revised: 1 March 2018 / Accepted: 6 March 2018 / Published: 8 March 2018
(This article belongs to the Special Issue Synthesis, Structure and Applications of 2D Nanomaterials)
We report the electrical characterization and field emission properties of MoS 2 bilayers deposited on a SiO 2 / Si substrate. Current–voltage characteristics are measured in the back-gate transistor configuration, with Ti contacts patterned by electron beam lithography. We confirm the n-type character of as-grown MoS 2 and we report normally-on field-effect transistors. Local characterization of field emission is performed inside a scanning electron microscope chamber with piezo-controlled tungsten tips working as the anode and the cathode. We demonstrate that an electric field of ~ 200   V / μ m is able to extract current from the flat part of MoS 2 bilayers, which can therefore be conveniently exploited for field emission applications even in low field enhancement configurations. We show that a Fowler–Nordheim model, modified to account for electron confinement in two-dimensional (2D) materials, fully describes the emission process. View Full-Text
Keywords: Transition metal dichalcogenides; MoS2; field-effect transistor; field emission Transition metal dichalcogenides; MoS2; field-effect transistor; field emission
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MDPI and ACS Style

Urban, F.; Passacantando, M.; Giubileo, F.; Iemmo, L.; Di Bartolomeo, A. Transport and Field Emission Properties of MoS2 Bilayers. Nanomaterials 2018, 8, 151.

AMA Style

Urban F, Passacantando M, Giubileo F, Iemmo L, Di Bartolomeo A. Transport and Field Emission Properties of MoS2 Bilayers. Nanomaterials. 2018; 8(3):151.

Chicago/Turabian Style

Urban, Francesca, Maurizio Passacantando, Filippo Giubileo, Laura Iemmo, and Antonio Di Bartolomeo. 2018. "Transport and Field Emission Properties of MoS2 Bilayers" Nanomaterials 8, no. 3: 151.

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