scholarly journals THE FREQUENCY MEASUREMENTS OF DIELECTRIC PROPERTIES IN THE PHASE TRANSITION RANGE IN THE Li_{0.02}Na_{0.98}NbO_3

1999 ◽  
Vol 2 (4) ◽  
pp. 643
Author(s):  
Smiga
Keyword(s):  
Phase Transition ◽  
Dielectric Properties ◽  
Transition Range ◽  
Frequency Measurements ◽  
Phase Transition Range

Influence of mixed organic cations on the structural and optical properties of lead tri-iodide perovskites

Nanoscale ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 5215-5221 ◽  
Author(s):  
Guotao Pang ◽  
Xiaoqi Lan ◽  
Ruxue Li ◽  
Zhubing He ◽  
Rui Chen
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Organic Cation ◽  
Organic Cations ◽  
Temperature Dependent ◽  
Structural And Optical Properties ◽  
Transition Range ◽  
Phase Transition Range ◽  
Temperature Dependent Photoluminescence

Temperature-dependent photoluminescence in the phase transition range shows that mixed-organic-cation perovskites are more stable than their pure counterparts.

The Influence of Thermomechanical Treatment on R–Phase Transition and Shape Memory Effect

1991 ◽  
Vol 246 ◽  
Author(s):  
Guo Jinfang ◽  
Cheng Yuying ◽  
Zhu Ming ◽  
Shen Long ◽  
Yuan Guansen
Keyword(s):  
Phase Transition ◽  
Memory Effect ◽  
Shape Recovery ◽  
Annealing Temperature ◽  
Cold Deformation ◽  
Tini Alloy ◽  
Phase Transformation Temperature ◽  
Transition Range ◽  
Phase Transition Range ◽  
The Stability

AbstractThis paper discussed the influence of cold working and annealing process on R–phase SME in an equiatomic TiNi alloy by means of tensile test, phase transformation, temperature measurement, and shape recovery examination. The results show that the increase in cold deformation of TiNi alloy got the increase in both tensile strength and R–phasc transition (TR–Ms). As R–phase becomes stable, the SME will be improved and the decay of memory effect will also be controlled at fatique test. The increase in annealing temperature got the decrease in R–phase transition range. In that case the stability of R–phase and the SME of the alloy also become bad. When annealing at 600°C, the recrystallization occurs no R–phase is found. Surely the SME of alloy becomes bad.

Dependence on neutral salt concentration of the latency phase in the time course of hydrolysis of dimyristoylphosphatidylcholine liposomes by phospholipase A2

1991 ◽  
Vol 69 (10-11) ◽  
pp. 715-721 ◽  
Author(s):  
Marta S. Fernández ◽  
Ricardo Mejía ◽  
Eunice Zavala ◽  
Fermín Pacheco
Keyword(s):  
Phase Transition ◽  
Time Course ◽  
Latency Period ◽  
High Salt ◽  
Phospholipase A ◽  
Neutral Salt ◽  
Transition Range ◽  
Nacl Concentration ◽  
Lag Period ◽  
Phase Transition Range

The time course of the hydrolytic action of porcine pancreatic phospholipase A2 on sonicated dimyristoylphosphatidylcholine liposomes in the presence of variable NaCl concentrations has been studied at temperatures between 17 and 36 °C; at these temperatures liposomes are in the gel phase. At a NaCl concentration of 10 mM, the hydrolysis shows a small and constant lag period of 6–8 min at all temperatures within this range. As the temperature is raised into the liquid crystalline range, the latency phase lengthens monotonically so that at 36 °C it reaches 55 min. An increase in the NaCl concentration to 1 M makes the lag period longer at all temperatures studied, with the exception of the phase transition range (near 24 °C); within this temperature range, a small reduction in the lag time is observed. The increase in the length of the latency period at high salt concentrations may be due to screening of the negative surface charge generated by the nascent fatty acid which seems to be essential for the efficient interfacial binding of the enzyme. In the phase transition range of the lamellae, the unfavorable effect of high salt concentrations on the electrostatic binding of the enzyme appears to be overcome by another type of interaction. Recent findings raise the possibility that this interaction could be hydrophobic in nature.Key words: phospholipase A2, liposomes, hydrolysis, salt, latency phase.

Reflection of elastic waves in a crystal of Heusler alloy Ni2MnGa in the phase transition range

2009 ◽  
Vol 54 (1) ◽  
pp. 82-88
Author(s):  
M. M. Karpuk ◽  
D. A. Kostiuk ◽  
Yu. A. Kuzavko ◽  
V. G. Shavrov
Keyword(s):  
Phase Transition ◽  
Elastic Waves ◽  
Heusler Alloy ◽  
Transition Range ◽  
Phase Transition Range

scholarly journals Reconfigurable artificial microswimmers with internal feedback

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
L. Alvarez ◽  
M. A. Fernandez-Rodriguez ◽  
A. Alegria ◽  
S. Arrese-Igor ◽  
K. Zhao ◽  
...  
Keyword(s):  
Phase Transition ◽  
Dielectric Properties ◽  
Light Absorption ◽  
Local Heating ◽  
Volume Phase Transition ◽  
Active Materials ◽  
Colloidal Clusters ◽  
Robotic Devices ◽  
Dynamical Control ◽  
Synthetic Models

AbstractSelf-propelling microparticles are often proposed as synthetic models for biological microswimmers, yet they lack the internally regulated adaptation of their biological counterparts. Conversely, adaptation can be encoded in larger-scale soft-robotic devices but remains elusive to transfer to the colloidal scale. Here, we create responsive microswimmers, powered by electro-hydrodynamic flows, which can adapt their motility via internal reconfiguration. Using sequential capillary assembly, we fabricate deterministic colloidal clusters comprising soft thermo-responsive microgels and light-absorbing particles. Light absorption induces preferential local heating and triggers the volume phase transition of the microgels, leading to an adaptation of the clusters’ motility, which is orthogonal to their propulsion scheme. We rationalize this response via the coupling between self-propulsion and variations of particle shape and dielectric properties upon heating. Harnessing such coupling allows for strategies to achieve local dynamical control with simple illumination patterns, revealing exciting opportunities for developing tactic active materials.

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