Hydrogen-doping induced reduction in the phase transition temperature of VO2: a first-principles study

2015 ◽  
Vol 17 (32) ◽  
pp. 20998-21004 ◽  
Author(s):  
Yuanyuan Cui ◽  
Siqi Shi ◽  
Lanli Chen ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
First Principles ◽  
First Principles Study ◽  
Hydrogen Doping ◽  
External Strain

The phase transition temperature of H-doped VO2 is more sensitive to external strain as compared with that of pure VO2.

First-principles study on the phase transition temperature of X-doped (X = Li, Na or K) VO2

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64394-64399 ◽  
Author(s):  
Yuanyuan Cui ◽  
Yongxin Wang ◽  
Bin Liu ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Infrared Absorption ◽  
First Principles ◽  
Electronic Structures ◽  
Near Infrared ◽  
Doping Element ◽  
First Principles Study

The calculated electronic structures and optical properties indicate that K can be selected as an appropriate doping element for VO2, since it can effectively lower the phase transition temperature as well as enhance the near-infrared absorption.

Orbital change manipulation metal–insulator transition temperature in W-doped VO2

2015 ◽  
Vol 17 (17) ◽  
pp. 11638-11646 ◽  
Author(s):  
Xinfeng He ◽  
Yijie Zeng ◽  
Xiaofeng Xu ◽  
Congcong Gu ◽  
Fei Chen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Infrared Spectroscopy ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
First Principles ◽  
Insulator Transition ◽  
First Principles Calculations ◽  
Orbital Structure ◽  
Metal Insulator Transition ◽  
Metal Insulator

Using ultraviolet-infrared spectroscopy and first principles calculations, it is revealed that changes in the orbital structure can regulate the W-doped VO2 phase transition temperature.

scholarly journals Atomic and electronic structures of charge-doping VO2: first-principles calculations

RSC Advances ◽  
2020 ◽  
Vol 10 (32) ◽  
pp. 18543-18552 ◽  
Author(s):  
Lanli Chen ◽  
Yuanyuan Cui ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
First Principles ◽  
Electronic Structures ◽  
First Principles Calculations ◽  
Charge Doping

The controllable phase transition temperature in charge doping VO2 is coupled with changes in the atomic and electronic structures. The current results provide a variable way to tune the VO2 phase transition temperature through charge doping.

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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