Depressed Phase Transition in Solution-Grown VO2 Nanostructures
The first-order metal-insulator phase transition in VO{sub 2} is characterized by an ultrafast several-orders-of-magnitude change in electrical conductivity and optical transmittance, which makes this material an attractive candidate for the fabrication of optical limiting elements, thermochromic coatings, and Mott field-effect transistors. Here, we demonstrate that the phase-transition temperature and hysteresis can be tuned by scaling VO{sub 2} to nanoscale dimensions. A simple hydrothermal protocol yields anisotropic free-standing single-crystalline VO{sub 2} nanostructures with a phase-transition temperature depressed to as low as 32 C from 67 C in the bulk. The observations here point to the importance of carefully controlling the stochiometry and dimensions of VO{sub 2} nanostructures to tune the phase transition in this system.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 980132
- Report Number(s):
- BNL-93050-2010-JA; JACSAT; TRN: US201015%%1517
- Journal Information:
- Journal of the American Chemical Society, Vol. 131, Issue 25; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrothermal synthesis and thermal change in IR reflectance of Al/W co-doped VO2 powder
Thermochromism of sputter-deposited vanadium oxyfluoride coatings