A real time observation of phase transition of anatase TiO < inf> 2 nanotubes into rutile nanoparticles by in-situ joule heating inside transmission electron microscope
Document Type
Article
Publication Date
12-1-2010
Abstract
We report the in situ Joule heating induced phase transformation of anatase TiO2 nanotubes into rutile nanoparticles inside a high-resolution transmission electron microscope (TEM) equipped with a scanning tunneling microscopy (STM) probe. Under a bias heating of 10 V, the anatase TiO2 nanotube breaks into ultrafine anatase nanoparticles of average size between 5-10 nm. On further increasing the bias voltage to 20 V, the nanoclusters of anatase particles become prone to a solid state reaction and are grown into stable rutile nanoparticles of size ranging between 20-25 nm. The formation of rutile nanoparticles was confirmed by the observation of diffraction pattern and high resolution imaging of these particles, which corresponds to the tetragonal TiO2 rutile phase (a = 4.59 Å, c = 2.95 Å, P42/mnm). © 2010 American Scientific Publishers.
Publication Title
Advanced Science Letters
Recommended Citation
Asthana, A.,
Shokuhfar, T.,
Gao, Q.,
Heiden, P.,
Friedrich, C.,
&
Yassar, R.
(2010).
A real time observation of phase transition of anatase TiO < inf> 2 nanotubes into rutile nanoparticles by in-situ joule heating inside transmission electron microscope.
Advanced Science Letters,
3(4), 557-562.
http://doi.org/10.1166/asl.2010.1191
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/12736