材料科学
绝缘体(电)
电场
纳米尺度
离子键合
纳米技术
脱氢
光电子学
小型化
氢
金属-绝缘体过渡
电致变色
化学物理
金属
催化作用
离子
电极
化学
生物化学
物理
有机化学
量子力学
冶金
物理化学
作者
Linglong Li,Meng Wang,Yadong Zhou,Yang Zhang,Fan Zhang,Yongshun Wu,Yujia Wang,Yingjie Lyu,Nianduan Lu,Guopeng Wang,Huining Peng,Shengchun Shen,Yingge Du,Zihua Zhu,Nan Chen,Pu Yu
出处
期刊:Nature Materials
[Springer Nature]
日期:2022-09-29
卷期号:21 (11): 1246-1251
被引量:12
标识
DOI:10.1038/s41563-022-01373-4
摘要
Manipulating the insulator-metal transition in strongly correlated materials has attracted a broad range of research activity due to its promising applications in, for example, memories, electrochromic windows and optical modulators1,2. Electric-field-controlled hydrogenation using ionic liquids3-6 and solid electrolytes7-9 is a useful strategy to obtain the insulator-metal transition with corresponding electron filling, but faces technical challenges for miniaturization due to the complicated device architecture. Here we demonstrate reversible electric-field control of nanoscale hydrogenation into VO2 with a tunable insulator-metal transition using a scanning probe. The Pt-coated probe serves as an efficient catalyst to split hydrogen molecules, while the positive-biased voltage accelerates hydrogen ions between the tip and sample surface to facilitate their incorporation, leading to non-volatile transformation from insulating VO2 into conducting HxVO2. Remarkably, a negative-biased voltage triggers dehydrogenation to restore the insulating VO2. This work demonstrates a local and reversible electric-field-controlled insulator-metal transition through hydrogen evolution and presents a versatile pathway to exploit multiple functional devices at the nanoscale.
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