Solid-state-reaction synthesis of VO2 nanoparticles with low phase transition temperature, enhanced chemical stability and excellent thermochromic properties

RSC Advances ◽  
2015 ◽  
Vol 5 (130) ◽  
pp. 108015-108022 ◽  
Author(s):  
Nan Shen ◽  
Bingrong Dong ◽  
Chuanxiang Cao ◽  
Zhang Chen ◽  
Hongjie Luo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Solid State ◽  
Phase Transition Temperature ◽  
Chemical Stability ◽  
Solid State Reaction ◽  
Reaction Synthesis ◽  
Thermochromic Properties

Solid-state-reaction synthesis of VO2 nanoparticles at 500 °C with different time.

High-Temperature Optical Properties of Thin-Film Vanadium Oxides – VO2 and V2O3

1997 ◽  
Vol 479 ◽  
Author(s):  
Michael S. Thomas ◽  
Jeff F. DeNatale ◽  
Patrick J. Hood
Keyword(s):  
Thin Film ◽  
Phase Transition ◽  
Optical Properties ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Spectral Region ◽  
Vanadium Sesquioxide ◽  
Infrared Spectral ◽  
Thermochromic Properties ◽  
Optical Applications

AbstractThin-film vanadium dioxide (VO2) and vanadium sesquioxide (V2O3) undergo shear phase transformations at 340K and 120K, respectively. The electrical and infrared optical properties of these materials are dramatically impacted by this phase transformation. Below the phase transition temperature, both VO2 and V2O3 are “poor” electrical insulators and have minimal absorption in the infrared spectral region. Above the phase transition temperature, both VO2 and V2O3 are poor conductors and are opaque in the infrared. The infrared thermochromic properties of these materials make them interesting candidates for several optical applications.Utilization of either VO2 or V2O3 necessitates an accurate knowledge of the optical properties both above and below the phase transition temperature. This paper reports on some recent infrared ellipsometric measurements on the optical properties of these materials above the transition temperature. These measurements found that both are strongly dispersive through the 3–12 micron spectral region. In addition, the temperature dependence of the optical properties of VO2 above the transition temperature can be related to the film morphology and stoichiometry.

Solid-state reaction synthesis and chemical stability studies in Nd-doped zirconolite-rich ceramics

2018 ◽  
Vol 36 (5) ◽  
pp. 492-498 ◽  
Author(s):  
Dan Yin ◽  
Kuibao Zhang ◽  
Le Peng ◽  
Zongsheng He ◽  
Yuan Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Chemical Stability ◽  
Solid State Reaction ◽  
Reaction Synthesis ◽  
Stability Studies

The structure of membranes and membrane proteins embedded in amorphous ice

1992 ◽  
Vol 50 (1) ◽  
pp. 432-433
Author(s):  
Uwe Lücken ◽  
Joachim Jäger
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Membrane Proteins ◽  
Phase Transition Temperature ◽  
Lipid Vesicles ◽  
Freezing Stress ◽  
Amorphous Ice ◽  
Different Temperatures ◽  
Band Pass ◽  
Lipid Polymorphism

TEM imaging of frozen-hydrated lipid vesicles has been done by several groups Thermotrophic and lyotrophic polymorphism has been reported. By using image processing, computer simulation and tilt experiments, we tried to learn about the influence of freezing-stress and defocus artifacts on the lipid polymorphism and fine structure of the bilayer profile. We show integrated membrane proteins do modulate the bilayer structure and the morphology of the vesicles.Phase transitions of DMPC vesicles were visualized after freezing under equilibrium conditions at different temperatures in a controlled-environment vitrification system. Below the main phase transition temperature of 24°C (Fig. 1), vesicles show a facetted appearance due to the quasicrystalline areas. A gradual increase in temperature leads to melting processes with different morphology in the bilayer profile. Far above the phase transition temperature the bilayer profile is still present. In the band-pass-filtered images (Fig. 2) no significant change in the width of the bilayer profile is visible.

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