7 research outputs found
The influence of plasma dynamics on the growth of Sm0.55Nd0.45NiO3 solid solution during pulsed laser deposition
Please read abstract in article.The African Laser Centre (ALC) and the Nanoscience African Network (NANOAFNET).http://www.elsevier.com/locate/jpc
Competitive growth texture of pulse laser deposited VO2 nanostructures on a glass substrate
We report on the crystal structure and morphology of vanadium dioxide (VO2) nanostructures synthesized by pulsed laser deposition
on soda-lime glass substrates. The VO2 nanostructures exhibit sharp a-axis diffraction peaks, characteristic of the VO2 monoclinic phase,
which implies that highly a-axis textured VO2 was formed. A detailed description of the growth mechanisms and the substrate–film interaction
is given, and the characteristics of the electronic transition and hysteresis of the phase transition are described in terms of the
morphology and grain boundary structure. The sharpness of the transition and the hysteresis upon heating and cooling are found to
be strong functions of the crystal structure and microstructure (grain size and shape).UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, INRS (Canada), the ICTP-Trieste and the NANOAFNET.http://www.elsevier.com/locate/actamathb2014ai201
Effect of substrate temperature on the structure and the metal insulator transition in pulsed laser deposed V02\ films on soda lime glass
In this paper, we report the effect of soda lime substrate deposition temperature (Ts) on the crystal structure and
the metal insulator transition of VO2 thin films. Samples were deposited at substrate deposition temperature
ranging from 450 to 600 0C by pulsed-laser deposition and characterized by x-ray diffraction and UV-VIS
spectrophotometer. At a substrate temperature of 550°C, the VO2 (100) reflection dominate the spectrum
showing a change in crystalline grains orientation. The highest transition temperatures of 74 oC with the lowest
hysteresis width of 11 oC were obtained on the same sample grown at a substrate deposition temperature of 500
oC and also corresponding to the largest grains size of a value of 350 nm.http://link.springer.com/journal/125962016-03-31hb201