scholarly journals Fully Controllable Structural Phase Transition in Thermomechanical Molecular Crystals with a Very Small Thermal Hysteresis

Small ◽  
2021 ◽  
Vol 17 (14) ◽  
pp. 2006757
Author(s):  
Yulong Duan ◽  
Sergey Semin ◽  
Paul Tinnemans ◽  
Jialiang Xu ◽  
Theo Rasing
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Thermal Hysteresis ◽  
Structural Phase ◽  
Molecular Crystals

scholarly journals High-contrast and reversible polymer thermal regulator by structural phase transition

2019 ◽  
Vol 5 (12) ◽  
pp. eaax3777 ◽  
Author(s):  
Ramesh Shrestha ◽  
Yuxuan Luan ◽  
Sunmi Shin ◽  
Teng Zhang ◽  
Xiao Luo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Thermal Hysteresis ◽  
Structural Phase ◽  
Phonon Transport ◽  
High Contrast ◽  
Active Components ◽  
Gauche Conformation ◽  
Trans Conformation ◽  
Experimental Values

In comparison with the advancement of switchable, nonlinear, and active components in electronics, solid-state thermal components for actively controlling heat flow have been extremely rare. We demonstrate a high-contrast and reversible polymer thermal regulator based on the structural phase transition in crystalline polyethylene nanofibers. This structural phase transition represents a dramatic change in morphology from a highly ordered all-trans conformation to a combined trans and gauche conformation with rotational disorder, leading to an abrupt change in phonon transport along the molecular chains. For five nanofiber samples measured here, we observe an average thermal switching ratio of ~8× and maximum switching ratio of ~10×, which occurs in a narrow temperature range of 10 K across the structural phase transition. To the best of our knowledge, the ~10× switching ratio exceeds any reported experimental values for solid-solid and solid-liquid phase transitions of materials. There is no thermal hysteresis observed upon heating/cooling cycles.

Dipole fluctuation and structural phase transition in hydrogen-bonding molecular assemblies of mononuclear CuII complexes with polar fluorobenzoate ligands

2021 ◽  
Vol 50 (39) ◽  
pp. 13680-13685
Author(s):  
Kiyonori Takahashi ◽  
Yuji Miyazaki ◽  
Shin-ichiro Noro ◽  
Motohiro Nakano ◽  
Takayoshi Nakamura ◽  
...  
Keyword(s):  
Phase Transition ◽  
Hydrogen Bonding ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Molecular Crystals ◽  
Molecular Assemblies ◽  
Dipole Interactions

An effective approach to construct dynamic motional space in molecular crystals is accomplished by combining hydrogen-bonding chains with dipole–dipole interactions in mononuclear CuII complexes.

Structural Phase Transition of Multilayer VSe2

2020 ◽  
Vol 12 (22) ◽  
pp. 25143-25149 ◽  
Author(s):  
Dian Li ◽  
Xiong Wang ◽  
Chi-ming Kan ◽  
Daliang He ◽  
Zejun Li ◽  
...  
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase

scholarly journals Raman spectroscopy study of the behavior of the soft mode in a structural phase transition in the Pr3Sb5O12 crystal

2015 ◽  
Vol 57 (11) ◽  
pp. 2286-2289 ◽  
Author(s):  
A. S. Oreshonkov ◽  
A. K. Khodzhibaev ◽  
A. S. Krylov ◽  
M. F. Umarov ◽  
A. N. Vtyurin
Keyword(s):  
Phase Transition ◽  
Raman Spectroscopy ◽  
Structural Phase Transition ◽  
Soft Mode ◽  
Structural Phase ◽  
Spectroscopy Study

High-pressure structural phase transition and metallization in Ga2S3 under non-hydrostatic and hydrostatic conditions up to 36.4 GPa

2021 ◽  
Author(s):  
Linfei Yang ◽  
Jianjun Jiang ◽  
Lidong Dai ◽  
Haiying Hu ◽  
Meiling Hong ◽  
...  
Keyword(s):  
Phase Transition ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
Structural Properties ◽  
Structural Phase Transition ◽  
First Principles ◽  
Theoretical Calculations ◽  
Structural Phase

The vibrational, electrical and structural properties of Ga2S3 were explored by Raman spectroscopy, EC measurements, HRTEM and First-principles theoretical calculations under different pressure environments up to 36.4 GPa.

scholarly journals Study of the structural phase transition in diamond (100) & (111) surfaces

Carbon Trends ◽  
2021 ◽  
Vol 3 ◽  
pp. 100033
Author(s):  
H. Gomez ◽  
M.N. Groves ◽  
M.R. Neupane
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase
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