School Of Basic And Applied Sciences

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Author: search.filters.author.Patil, S.I.

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    Nano-Heteroarchitectures of Two-Dimensional MoS2@ One-Dimensional Brookite TiO2 Nanorods: Prominent Electron Emitters for Displays
    (American Chemical Society, 2017) Devan, R.S.; Thakare, V.P.; Antad, V.V.; Chikate, P.R.; Khare, R.T.; More, M.A.; Dhayal, R.S.; Patil, S.I.; Ma, Y.-R.; Schmidt-Mende, L.
    We report comparative field electron emission (FE) studies on a large-area array of two-dimensional MoS2-coated one-dimensional (1D) brookite (?) 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 ?-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/?m required to a draw current density of 10 ?A/cm2 observed for MoS2-coated 1D ?-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 (?FE) 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@?-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. ? 2017 American Chemical Society.
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    Electron transport behavior and charge ordering phenomena in La0.5Ca0.5MnO3
    (Elsevier Ltd, 2016) Kekade, S.S.; Devan, R.S.; Deshmukh, A.V.; Phase, D.M.; Choudhary, R.J.; Patil, S.I.
    In this study, the polycrystalline sample of La0.5Ca0.5MnO3 (LCMO) with perovskite (Orthorhombic) crystalline structure was synthesized by citrate gel method. The temperature dependent magnetization studies exhibit both paramagnetic to ferromagnetic and ferromagnetic to antiferromagnetic transition of LCMO at ?230 K and ?150 K, respectively. The X-ray photoemission spectroscopy data revealed electronic structures, chemical properties, while the valence band photoemission spectra for LCMO measured at various photon energies ranging from 40 eV to 60 eV, showed Fano curve like resonance behavior for Mn 3p to 3d transition and also confirmed the change of DOS near Fermi level. ? 2016 Elsevier B.V.