Direct observation of the structural component of the metal-insulator phase transition and growth habits of epitaxially grown VO2 nanowires

Jung Inn Sohn, Heung Jin Joo, Alexandra E. Porter, Chel Jong Choi, Kinam Kim, Dae Joon Kang, Mark E. Welland

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

Abstract

We have grown epitaxially orientation-controlled monoclinic VO2 nanowires without employing catalysts by a vapor-phase transport process. Electron microscopy results reveal that single crystalline VO2 nanowires having a [100] growth direction grow laterally on the basal c plane and out of the basal r and a planes of sapphire, exhibiting triangular and rectangular cross sections, respectively. In addition, we have directly observed the structural phase transition of single crystalline VO2 nanowires between the monoclinic and tetragonal phases which exhibit insulating and metallic properties, respectively, and clearly analyzed their corresponding relationships using in situ transmission electron microscopy.

Original languageEnglish
Pages (from-to)1570-1574
Number of pages5
JournalNano Letters
Volume7
Issue number6
DOIs
StatePublished - Jun 2007

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