Novel optical and electrical properties of newly synthesized nano-wires of monoclinic WO3 and nano-belts of rutile VO2 have been investigated by Raman spectroscopy and thermochromism studies respectively. Phonon confinement is observed in the WO3 nano-wires and the previously modified Richter equation is fitted to the experimental Raman spectroscopy data to obtain the optical phonon dispersion relations for the 713 cm–1 branch and the 808 cm–1 branch of WO3 phonon spectra for the first time. Electrical measurements on the VO2 nano-belts at varying temperature reveal an enhanced hysteresis width of about 83 °C surpassing previously reported values on the thermo-chromism studies on VO2.
Reference:
Mwakikunga, BW, Sideras-Haddad, E, Forbes, A and Arendse, C. 2008. Raman spectroscopy of WO3 nano-wires and thermo-chromism study of VO2 belts produced by ultrasonic spray and laser pyrolysis techniques. Physica Status Solidi (a) Applications and Materials Science, Vol. 205(1), pp 150-154
Mwakikunga, B. W., Sideras-Haddad, E., Forbes, A., & Arendse, C. (2008). Raman spectroscopy of WO3 nano-wires and thermo-chromism study of VO2 belts produced by ultrasonic spray and laser pyrolysis techniques. http://hdl.handle.net/10204/1826
Mwakikunga, Bonex W, E Sideras-Haddad, A Forbes, and C Arendse "Raman spectroscopy of WO3 nano-wires and thermo-chromism study of VO2 belts produced by ultrasonic spray and laser pyrolysis techniques." (2008) http://hdl.handle.net/10204/1826
Mwakikunga BW, Sideras-Haddad E, Forbes A, Arendse C. Raman spectroscopy of WO3 nano-wires and thermo-chromism study of VO2 belts produced by ultrasonic spray and laser pyrolysis techniques. 2008; http://hdl.handle.net/10204/1826.
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