An electron microscopic investigation of structural variation of V2O5 fibers after working as ethanol sensors

Ning Ding; Liu, Shuhua; Chunhua Chen; Lieberwirth, Ingo
October 2008
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p173510
Academic Journal
This is a study of V2O5 fibers as ethanol sensors. The variation in the V2O5 electronic state and its structure after reaction with ethanol are investigated by electron energy-loss spectroscopy and electron diffraction. Results show that after reaction the oxidation state of vanadium in V2O5 is reduced to +4, and the crystallinity of V2O5 is completely destroyed, forming amorphous VO2 nanoparticles. High-resolution transmission electron microscopy shows that the diameter of amorphous VO2 nanoparticles is about 4 nm.


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