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Scientific reports v.6, 2016년, pp.37296 -    SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Current induced polycrystalline-to-crystalline transformation in vanadium dioxide nanowires

Jeong, Junho (Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada ) ; Yong, Zheng (Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada ) ; Joushaghani, Arash (Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada ) ; Tsukernik, Alexander (Toronto Nanofabrication Centre, University of Toronto, Toronto, Ontario, M5S 3G4, Canada ) ; Paradis, Suzanne (Defence Research and Development Canada - Valcartier, Quebec, Quebec G3J 1X5, Canada ) ; Alain, David (Defence Research and Development Canada - Valcartier, Quebec, Quebec G3J 1X5, Canada ) ; Poon, Joyce K. S. (Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada ) ;
  • 초록  

    Vanadium dioxide (VO 2 ) exhibits a reversible insulator-metal phase transition that is of significant interest in energy-efficient nanoelectronic and nanophotonic devices. In these applications, crystalline materials are usually preferred for their superior electrical transport characteristics as well as spatial homogeneity and low surface roughness over the device area for reduced scattering. Here, we show applied electrical currents can induce a permanent reconfiguration of polycrystalline VO 2 nanowires into crystalline nanowires, resulting in a dramatically reduced hysteresis across the phase transition and reduced resistivity. Low currents below 3 mA were sufficient to cause the local temperature in the VO 2 to reach about 1780 K to activate the irreversible polycrystalline-to-crystalline transformation. The crystallinity was confirmed by electron microscopy and diffraction analyses. This simple yet localized post-processing of insulator-metal phase transition materials may enable new methods of studying and fabricating nanoscale structures and devices formed from these materials.


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