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Nano-Heteroarchitectures of Two-Dimensional MoS2@ One-Dimensional Brookite TiO2 Nanorods: Prominent Electron Emitters for Displays
journal contribution
posted on 2017-06-23, 11:52 authored by Rupesh S. Devan, Vishal P. Thakare, Vivek V. Antad, Parameshwar R. Chikate, Ruchita T. Khare, Mahendra A. More, Rajendra S. Dhayal, Shankar I. Patil, Yuan-Ron Ma, Lukas Schmidt-MendeWe report comparative field electron
emission (FE) studies on a
large-area array of two-dimensional MoS2-coated @ one-dimensional
(1D) brookite (β) TiO2 nanorods synthesized on Si
substrate utilizing hot-filament metal vapor deposition technique
and pulsed laser deposition method, independently. The 10 nm wide
and 760 nm long 1D β-TiO2 nanorods were coated with
MoS2 layers of thickness ∼4 (±2), 20 (±3),
and 40 (±3) nm. The turn-on field (Eon) of 2.5 V/μm required to a draw current density of 10 μA/cm2 observed for MoS2-coated 1D β-TiO2 nanorods emitters is significantly lower than that of doped/undoped
1D TiO2 nanostructures, pristine MoS2 sheets,
MoS2@SnO2, and TiO2@MoS2 heterostructure-based field emitters. The orthodoxy test confirms
the viability of the field emission measurements, specifically field
enhancement factor (βFE) of the MoS2@TiO2/Si emitters. The enhanced FE behavior of the MoS2@TiO2/Si emitter can be attributed to the modulation of
the electronic properties due to heterostructure and interface effects,
in addition to the high aspect ratio of the vertically aligned TiO2 nanorods. Furthermore, these MoS2@TiO2/Si emitters exhibit better emission stability. The results obtained
herein suggest that the heteroarchitecture of MoS2@β-TiO2 nanorods holds the potential for their applications in FE-based
nanoelectronic devices such as displays and electron sources. Moreover,
the strategy employed here to enhance the FE behavior via rational
design of heteroarchitecture structure can be further extended to
improve other functionalities of various nanomaterials.
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Keywords
MoS 2 heterostructure-based field emittersTiO 2 nanorodsProminent Electron Emitters1 D β- TiO 2 nanorodsFE behaviorMoS 2field electron emission1 D β- TiO 2 nanorods emittersMoS 2 sheetsFE-based nanoelectronic devicesOne-Dimensional Brookite TiO 2 NanorodsSiTwo-Dimensional MoS 2field emission measurementsMoS 2 layershot-filament metal vapor deposition techniquelaser deposition method
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