The effect of temperature on the properties of hydrothermally synthesized VO 2 nanostructures and electro-induced MIT
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The effect of temperature on the properties of hydrothermally synthesized VO2 nanostructures and electro‑induced MIT Xiaoning Sun1 · Zhaoming Qu1 · Qingguo Wang1 · Yang Yuan1 Received: 2 May 2020 / Accepted: 3 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Vanadium dioxide (VO2) will undergo a reversible phase transition when under thermal, electrical or optical stimuli. The use of electric field to induce the transport properties is promising for novel switches, volatile memory and photodetectors. In this paper, V O2 nanoparticles were synthesized by the hydrothermal and post-vacuum annealing method. And then, the O2 (B) electro-induced MIT of the composite film filled with V O2 particles was discussed. The results show that purity V with different morphologies were obtained at different temperatures from 120 to 240 °C. The HRTEM images proved that the VO2 (B) nanobelts grow in the direction of the (110) plane, and the VO2 (M) nanoparticles grow along the (110) crystal plane. SEM pictures illustrate that the length of the nanoparticles becomes smaller as the preparation temperature increases. DSC reports and I-V traces proved that the VO2 (M) has an excellent performance of phase transition under heating and voltage. The results show that the hydrothermal temperature is helpful to increase the initial resistance, resistance change rate and phase change voltage of VO2 composite film. And the maximum resistance change rate before and after the MIT of samples is higher than 200. The experimental results show that the VO2 coating has an excellent voltage nonlinear response, due to the apparent switching performance, high nonlinear coefficient, and good consistency. The research data and theoretical analysis of this paper have an excellent guiding role for the application of VO2 in the electro-induced phase transition.
1 Introduction Vanadium dioxide (VO2) is a traditional binary polymorphic compound that has been receiving tremendous attention with its diverse chemical structures, novel physical properties and potential applications [29]. As a typical strongly correlated system material, it can go through a unique reversible metal–insulator phase transition (MIT) from lower monoclinic structure to higher symmetry rutile-type tetragonal structure at around 340 K [33]. Accompanied by the phase transition, it shows a drastic change in optical [1], electrical [16, 21], thermal [6] and magnetic properties [19]. The transition temperature can also be changed up or down by element doping [3, 20, 21] and external multiphysics field
Xiaoning Sun and Zhaoming Qu have contributed equally to this work and should be considered co-first authors. * Qingguo Wang [email protected] 1
National Key Laboratory on Electromagnetic Environment Effects, Army Engineering University, Shijiazhuang 050003, China
excitation [28]. At present, most of the research work on VO2 is about the application of thermally induced phase transitions (MIT) [8, 14, 16]. Experiments have confirm
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