Impact of growth temperature on the crystal habits, forms and structures of VO2 nanocrystals
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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.
KeywordsQuartz Substrate Vanadium Oxide Insulator Transition Transmission Electron Microscopy Measurement Crystal Habit
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