Reversible phase-change behavior in two-dimensional antimony telluride (Sb2Te3) nanosheets

2018 ◽  
Vol 112 (13) ◽  
pp. 133101 ◽  
Author(s):  
Robin B. Jacobs-Gedrim ◽  
Michael T. Murphy ◽  
Fan Yang ◽  
Nikhil Jain ◽  
Mariyappan Shanmugam ◽  
...  
Keyword(s):  
Phase Change ◽  
Two Dimensional ◽  
Antimony Telluride ◽  
Change Behavior ◽  
Reversible Phase

Temperature Effect on the Two-Dimensional Phase Transition Kinetics of Adenine Adsorbed at the Hg Electrode/Aqueous Solution Interface

2003 ◽  
Vol 68 (8) ◽  
pp. 1407-1419 ◽  
Author(s):  
Claudio Fontanesi ◽  
Roberto Andreoli ◽  
Luca Benedetti ◽  
Roberto Giovanardi ◽  
Paolo Ferrarini
Keyword(s):  
Phase Transition ◽  
Aqueous Solution ◽  
Phase Change ◽  
Temperature Effect ◽  
Transition Rate ◽  
Effect Of Temperature ◽  
Two Dimensional ◽  
Solution Interface ◽  
Phase Transition Kinetics ◽  
Kinetics Of

The kinetics of the liquid-like → solid-like 2D phase transition of adenine adsorbed at the Hg/aqueous solution interface is studied. Attention is focused on the effect of temperature on the rate of phase change; an increase in temperature is found to cause a decrease of transition rate.

Effect of dopamine-modified expanded vermiculite on phase change behavior and heat storage characteristic of polyethylene glycol

2021 ◽  
Vol 415 ◽  
pp. 128992
Author(s):  
Heng Wang ◽  
Yong Deng ◽  
Fuzhong Wu ◽  
Xinyi Dai ◽  
Wenhao Wang ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Phase Change ◽  
Heat Storage ◽  
Expanded Vermiculite ◽  
Change Behavior

Effects of SiO2 interlayers on the phase change behavior in the multilayer Zn15Sb85/SiO2 materials

2019 ◽  
Vol 798 ◽  
pp. 342-349 ◽  
Author(s):  
Rui Zhang ◽  
Yifeng Hu ◽  
Qingqian Chou ◽  
Tianshu Lai ◽  
Xiaoqin Zhu
Keyword(s):  
Phase Change ◽  
Change Behavior

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.

Thermodynamic Nonequilibrium Phase Change Behavior and Thermal Properties of Biological Solutions for Cryobiology Applications

2004 ◽  
Vol 126 (2) ◽  
pp. 196-203 ◽  
Author(s):  
Bumsoo Han ◽  
John C. Bischof
Keyword(s):  
Thermal Properties ◽  
Phase Change ◽  
Latent Heat ◽  
Thermodynamic Equilibrium ◽  
Low Temperatures ◽  
Eutectic Phase ◽  
Phase Changes ◽  
Chemical Additives ◽  
Change Behavior ◽  
Saline Solutions

Understanding the phase change behavior of biomaterials during freezing/thawing including their thermal properties at low temperatures is essential to design and improve cryobiology applications such as cryopreservation and cryosurgery. However, knowledge of phase change behavior and thermal properties of various biomaterials is still incomplete, especially at cryogenic temperatures ⩽−40°C. Moreover, in these applications, chemicals are often added to improve their outcome, which can result in significant variation in the phase change behavior and thermal properties from those of the original biomaterials. These chemical additives include cryoprotective agents (CPAs), antifreeze protein (AFP), or cryosurgical adjuvants like sodium chloride (NaCl). In the present study, phase change behavior and thermal properties of saline solutions–either water-NaCl or phosphate buffered saline (PBS)–with various chemical additives were investigated. The chemical additives studied are glycerol and raffinose as CPAs, an AFP (Type III, molecular weight=6500), and NaCl as a cryosurgical adjuvant. The phase change behavior was investigated using a differential scanning calorimeter (DSC) and a cryomicroscope. The specific and latent heat of these solutions were also measured with the DSC. The saline solutions have two distinct phase changes–water/ice and eutectic phase changes. During freezing, eutectic solidification of both water-NaCl and PBS are significantly supercooled below their thermodynamic equilibrium eutectic temperatures. However, their melting temperatures are close to thermodynamic equilibrium during thawing. These eutectic phase changes disappear when even a small amount (0.1 M glycerol) of CPA was added, but they are still observed after the addition of an AFP. The specific heats of these solutions are close to that of ice at very low temperatures ⩽−100°C regardless of the additives, but they increase between −100°C and −30°C with the addition of CPAs. The amount of latent heat, which is evaluated with sample weight, generally decreases with the addition of the additives, but can be normalized to approximately 300 J/g based on the weight of water which participates in the phase change. This illustrates that thermal properties, especially latent heat, of a biomaterial should be evaluated based on the understanding of its phase change behavior. The results of the present study are discussed in the context of the implications for cryobiology applications.

Can two-dimensional confinement trigger the fragile-to-strong crossover in phase-change supercooled liquids

2021 ◽  
Vol 192 ◽  
pp. 89-93
Author(s):  
Qian Zhang ◽  
Yimin Chen ◽  
Wenhao Leng ◽  
Jierong Gu ◽  
Yuanen Mao ◽  
...  
Keyword(s):  
Phase Change ◽  
Supercooled Liquids ◽  
Two Dimensional
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