title: New aspects of size-dependent metal-insulator transition in synthetic single-domain monoclinic vanadium dioxide nanocrystals.
abstract: Nanoscale materials with size smaller than the characteristic domain size could simplify the domain structure and uncover the intrinsic properties in detail. Herein, a ultrafast open space calcination pathway is first put forward to synthesize high-quality single-domain VO(2)(M) nanocrystals and an in situ variable-temperature IR spectroscopy is first proposed to identify the size-dependent MIT behaviors in VO(2)(M) below single-domain size. The variable-temperature IR spectroscopy clearly reveals that these single-domain VO(2)(M) nanocrystals exhibit new size-dependent MIT behaviors, while the IR analysis further suggests that the size-related defect density and scattering efficiency could be used to account for their novel size-dependent MIT behaviors. This new characterization strategy of in situ variable-temperature IR spectroscopy holds great promise for extending to other systems to gain valuable insight into their intrinsic phase transition behaviors. Also, this ultrafast open space calcination pathway sets forth a new avenue in fabricating high-quality functional nanocrystals and paves the way for constructing intelligent nanodevices in the near future.
authors: Hefei National Laboratory for Physical Sciences at Microscale, University of Science & Technology of China, Hefei 230026, P.R. China.
authors: Yongfu
authors: Y
authors: Sun
authors: Shishi
authors: S
authors: Jiang
authors: Wentuan
authors: W
authors: Bi
authors: Ran
authors: R
authors: Long
authors: Xiaogang
authors: X
authors: Tan
authors: Changzheng
authors: C
authors: Wu
authors: Shiqiang
authors: S
authors: Wei
authors: Yi
authors: Y
authors: Xie
mesh_terms: D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014639:Vanadium / Q000737:chemistry*
chemical_list: D010087:Oxides; D014639:Vanadium