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| Thesis on Nature Magazine's Stablemate | |||
| 작성자 | Department of External Cooperation | 작성일 | 2020-07-28 |
| 조회수 | 295 | ||
| Thesis on Nature Magazine's Stablemate | |||||
 |
Department of External Cooperation |  |
2020-07-28 |  |
295 |
Academia pays attention to the cause of characterizing Transitions in a next-generation material, ’Vanadium dioxide’ As the characteristics of phase transition of Vanadium dioxide (VO2, Vandadindioxyd) which is emerging as a next-generation material, has been identified, is generating intense academia interest.
Vanadium dioxide is a material in which the phenomenon of ’phase transition between metal and insulator’ occurs very rapidly, and it is attracting attention as a key next-generation material for sensors, memory devices, smart windows, and high-speed switching devices. Phase transitions refers to a phenomenon in which a substance transits its phase under certain conditions. In order to commercialize a phase change material such as vanadium dioxide, it is important to rapidly transits (reversibility) its properties in response to changes in external conditions and to have strong durability against repeated phase transitions. During the phase transition process, hysteresis appears in which the past state affects the present state, and various researches are currently being conducted to reduce the hysteresis phenomenon that Vanadium dioxide adversely affects reversibility and durability. Professor Lee produced Vanadium dioxide thin films doped with various concentrations of Tungsten, and he analyzed the lattice constants (factors of crystal structure) at high and low temperatures. As a result, it was found that when the lattice constants of two different phases have a similar value, the hysteresis characteristics of the phase transition between the metal and the insulator are greatly reduced. Professor Lee said, "Through this study, it is expected that by understanding and controlling the properties of the substances for the phase transitions, it is possible to accelerate the practical use of various devices in the energy and bio fields using the phase change material." On 15th of July, Professor Lee Seung-hoon of Pukyong National University published his paper ’Tuning the hysteresis of a metal-insulator transition via lattice compatibility’, co-studied with the University of Maryland, the American Institute of Standards and Technology, the University of Hong Kong Science and Technology, and the University of Minnesota as co-leader authors in the international journal <Nature Communications>. <Pukyong Today> |
Professor Lee Seunghun (Dept. of Physics) of Pukyong National University, recently published a research in <Nature Communications>, an international academic journal, that the crystal structure of this material plays a key role in the phase transition of Vanadium dioxide.