Shape-controlled synthesis and influence of W doping and oxygen nonstoichiometry on the phase transition of VO2

被引:47
作者
Chen, Ru [1 ,2 ]
Miao, Lei [1 ,3 ]
Liu, Chengyan [3 ]
Zhou, Jianhua [3 ]
Cheng, Haoliang [1 ]
Asaka, Toru [4 ]
Iwamoto, Yuji [4 ]
Tanemura, Sakae [1 ,3 ]
机构
[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guangxi Collaborat Innovat Ctr Struct & Property, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
[4] Nagoya Inst Technol, Grad Sch Engn, Dept Frontier Mat, Showa Ku, Nagoya, Aichi 4668555, Japan
关键词
METAL-INSULATOR-TRANSITION; VANADIUM DIOXIDE; HYDROTHERMAL SYNTHESIS; FILMS; OXIDES; NANORODS; V1-XWXO2;
D O I
10.1038/srep14087
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Monoclinic VO2(M) in nanostructure is a prototype material for interpreting correlation effects in solids with fully reversible phase transition and for the advanced applications to smart devices. Here, we report a facile one-step hydrothermal method for the controlled growth of single crystalline VO2(M/R) nanorods. Through tuning the hydrothermal temperature, duration of the hydrothermal time and W-doped level, single crystalline VO2(M/R) nanorods with controlled aspect ratio can be synthesized in large quantities, and the crucial parameter for the shape-controlled synthesis is the W-doped content. The dopant greatly promotes the preferential growth of (110) to form pure phase VO2(M/R) nanorods with high aspect ratio for the W-doped level = 2.0 at% sample. The shape-controlled process of VO2(M/R) nanorods upon W-doping are systematically studied. Moreover, the phase transition temperature (T-c) of VO2 depending on oxygen nonstoichiometry is investigated in detail.
引用
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页数:12
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