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

Ru Chen, Lei Miao, Chengyan Liu, Jianhua Zhou, Haoliang Cheng, Toru Asaka, Yuji Iwamoto, Sakae Tanemura

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

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 (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 (Tc) of VO2 depending on oxygen nonstoichiometry is investigated in detail.

Original languageEnglish
Article number14087
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 2015 Sep 16

ASJC Scopus subject areas

  • General

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