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Issue 10, 2011
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New aspects of size-dependent metal-insulator transition in synthetic single-domain monoclinic vanadium dioxide nanocrystals

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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 VO2(M) nanocrystals and an in situ variable-temperature IR spectroscopy is first proposed to identify the size-dependent MIT behaviors in VO2(M) below single-domain size. The variable-temperature IR spectroscopy clearly reveals that these single-domain VO2(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.

Graphical abstract: New aspects of size-dependent metal-insulator transition in synthetic single-domain monoclinic vanadium dioxide nanocrystals

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Article information


Submitted
30 Jul 2011
Accepted
22 Aug 2011
First published
08 Sep 2011

Nanoscale, 2011,3, 4394-4401
Article type
Paper

New aspects of size-dependent metal-insulator transition in synthetic single-domain monoclinic vanadium dioxide nanocrystals

Y. Sun, S. Jiang, W. Bi, R. Long, X. Tan, C. Wu, S. Wei and Y. Xie, Nanoscale, 2011, 3, 4394
DOI: 10.1039/C1NR10976F

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