A phase-convertible fast ionic conductor with a monolithic plastic crystalline host

2021 ◽  
Author(s):  
Seongsoo Lee ◽  
Janghyuk Moon ◽  
His Muhammad Bintang ◽  
Sunghee Shin ◽  
Hun-Gi Jung ◽  
...  
Keyword(s):  
Phase Transition ◽  
Ionic Conductor ◽  
Solid Electrode ◽  
Ion Conductor ◽  
Heating And Cooling ◽  
Reversible Phase Transition ◽  
Reversible Phase ◽  
Fast Ionic Conductor ◽  
Conformal Contact

We present a fast Mg2+-ion conductor with a monolithic plastic crystalline host. Also, conformal contact with a solid electrode can be achieved by using the reversible phase transition of succinonitrile through simple heating and cooling processes.

Structure, ferroelasticity and Goldilocks zone phase transitions in C3H5N2Al(SO4)2·6H2O

2021 ◽  
Vol 77 (2) ◽  
pp. 225-231
Author(s):  
Bartosz Zarychta ◽  
Zbigniew Czapla ◽  
Janusz Przesławski ◽  
Przemysław Szklarz
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Structural Phase ◽  
Order Type ◽  
Optical Observations ◽  
Heating And Cooling ◽  
Reversible Phase Transition ◽  
Clear Increase ◽  
Reversible Phase ◽  
Trigonal Phase

The single crystal growth and sequence of reversible phase transition are described for C3H5N2Al(SO4)2·6H2O. Thermal and structural analyses combined with dielectric studies and optical observations revealed the structural phase transition at T 1 = 339/340 K (I↔II) and T 2 = 347/348 K (II↔III) on heating and cooling, respectively. Both phase transitions are of the first-order type. The symmetry changes from monoclinic to trigonal phase. At 293 K, the large crystals are usually divided into numerous domains of the ferroelastic type that disappear above T 1 on heating and reappear below T 1 on cooling. The domain structure pattern is characteristic for the transition between trigonal and monoclinic phases. The changes of entropy and clear increase of permittivity at T 1 provide evidence for the order–disorder character of this phase transition. The transition at T 2 seems to be displacive.

Temperature-Dependent Solid-state Luminescence and Reversible Phase Transition of (n-Bu4N)[Au(SC6H3-3,5-Me2)2]

2003 ◽  
Vol 32 (11) ◽  
pp. 1002-1003 ◽  
Author(s):  
Seiji Watase ◽  
Takayuki Kitamura ◽  
Nobuko Kanehisa ◽  
Masami Nakamoto ◽  
Yasushi Kai ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Temperature Dependent ◽  
Reversible Phase Transition ◽  
Reversible Phase ◽  
State Luminescence

Photoinduced reversible phase transition of azobenzene-containing polydiacetylene crystals

2016 ◽  
Vol 52 (97) ◽  
pp. 14059-14062 ◽  
Author(s):  
Woohyun Baek ◽  
Jung-Moo Heo ◽  
Seungwhan Oh ◽  
Sang-hwa Lee ◽  
Jaeyong Kim ◽  
...  
Keyword(s):  
Phase Transition ◽  
Reversible Phase Transition ◽  
Reversible Phase

A photoinduced reversible phase transition with a simultaneous crystal tearing phenomenon was observed in an azobenzene-containing supramolecular polydiacetylene (PDA) crystal.

Preparation of PVA/PEG Phase Change Composite Nanofibers by Electrospinning

2011 ◽  
Vol 306-307 ◽  
pp. 37-40 ◽  
Author(s):  
Da Hui Sun ◽  
Tian Yu Xu ◽  
Yong Jia Liu ◽  
Mei Zhang
Keyword(s):  
Phase Transition ◽  
Phase Change ◽  
Composite Nanofibers ◽  
Diameter Distribution ◽  
Weight Percentage ◽  
Weight Content ◽  
Reversible Phase Transition ◽  
Change Characteristics ◽  
Micro Morphology ◽  
Reversible Phase

Phase change PVA / PEG composite nanofibers were prepared by electrospinning, micro-morphology of PVA / PEG fibers with different weight content were analyzed, the phase change characteristics were also analyzed. The result showed that well distributed composite nanofibers which composed by PVA/PEG blend solution can be obtained by electrospinning.PVA fibreforming were influenced because of the existence of PEG, including bond, irregular block, small rough, uneven diameter distribution in fibers. PVA/PEG blend solution of 4:6 weight content was well fibreforming compared with other different weight content.The continuity of spinneret flow in electrospinning would directly affected by polymer solution consentrition and viscosity. Further research about which and the influence in fibers diameter and morphology will be explored. Composite nanofibers possessed reversible phase transition characteristics,Tm Essentially unchanged ,Tcwere related to the weight percentage of PEG/PVA, at the same time, the enthalpy will increase along with the gradually increase in weight percentage of PEG.

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