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Impact of growth temperature on the crystal habits, forms and structures of VO2 nanocrystals

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Abstract

We investigated the impact of the process temperature on the habits, forms and crystal structure of VO2 nanocrystals grown by a vapor-transport method on (0001) quartz substrates. Four distinct growth regimes were discerned: orthorhombic nanowires, sheets, hemispheres, and nanowires with a monoclinic structure. The nanostructures were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). I/V characterization of individual nanowires was enabled by Ti/Au contact formation via electron beam lithography and lift-off techniques. The expected metal–insulator transition (MIT) was found in monoclinic VO2 nanowires.

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Authors and Affiliations

  1. Institute of Solid State Electronics, Vienna University of Technology, Floragasse 7, 1040, Wien, Austria

    Stefan Löffler, Erwin Auer, Alois Lugstein & Emmerich Bertagnolli

  2. Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, 1060, Wien, Austria

    Matthias Weil

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  1. Stefan Löffler
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  2. Erwin Auer
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  3. Matthias Weil
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  4. Alois Lugstein
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  5. Emmerich Bertagnolli
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Correspondence to Alois Lugstein.

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Löffler, S., Auer, E., Weil, M. et al. Impact of growth temperature on the crystal habits, forms and structures of VO2 nanocrystals. Appl. Phys. A 102, 201–204 (2011). https://doi.org/10.1007/s00339-010-5940-5

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  • DOI: https://doi.org/10.1007/s00339-010-5940-5

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