Crystalline to amorphous phase transition

Author: lclf

August undefined, 2024

WebJan 1, 2014 · Crystalline and amorphous polymers are two main categories in polymer family. Polymer crystals are compact assembly of stereoregular chains and thus exhibit high modulus and hardness but weak toughness. Amorphous polymers, in contrast, may show rubbery or glassy behavior depending on their glass transition temperatures. WebIt is analogous to the polymorphism of crystalline materials. Many amorphous substances can exist with different amorphous characteristics (e.g. polymers). However, polyamorphism requires two distinct amorphous states with a clear, discontinuous (first-order) phase transition between them.

Polyamorphism - Wikipedia

WebOct 1, 2009 · Several ways of transformation are possible, and consequently, several amorphous clusters of similar or nearly similar free energy are possible. The transition … WebMay 14, 2024 · It was reported recently that the interface between the amorphous and crystalline phases plays a significant role in the electrocatalytic activity of transition metal compounds. It was reckoned therefore that an increase in the density of the crystalline–amorphous phase boundary would enhance the electrochemical water … flannel baby boys shirts

Phys. Rev. Lett. 111, 037401 (2013) - Controlling Localized Surface ...

WebApr 19, 2024 · The transformation of GeTe from the amorphous phase to the crystal phase induces a significant change in its resistance, which can be advantageous for devices such as phase change random... Web[26-30] These advanced applications rely on a unique combination of material properties; the rapid and reversible phase transition between the crystalline and amorphous … WebAmorphous ice (non-crystalline or "vitreous" ice) is an amorphous solid form of water. Common ice is a crystalline material wherein the molecules are regularly arranged in a hexagonal lattice, whereas amorphous ice lacks long-range order in … can russias nuclear weapons reach uk

$Effects of void shape and location on the fracture and plastic ...$

Crystallization of Amorphous Phase in Sputter-Deposited Ti-Al …

WebOther investigations on the V x O y films deposited by pulsed laser deposition (PLD), showed that the amorphous–crystalline transition temperature of V 2 O 5 films is … WebSep 10, 2008 · Chemical solution deposited (CSD) complex oxide thin films attract considerable interest in various emerging fields as for example, fuel cells, ferroelectric random access memories or coated conductors. In the present paper the results of soft-X-ray spectroscopy between 280 and 560 eV on the amorphous to crystalline phase … flannel baby girl clothesWebOct 25, 2014 · The thermodynamic factor also plays an important role in the amorphization of crystalline solids. From general considerations, we suggest that the crystalline to amorphous phase transition can occur provided that (1) E DC > E A where EDC and EА are the free energies of the deformed crystal and amorphous state, respectively. flannel baby fabric by the yard

"Web1 day ago · Mesoporous materials, which exhibit great potential in the control of polymorphs and delivery of poorly water-soluble drugs, have obtained considerable attention in the field of pharmaceutical science. The physical properties and release behaviors of amorphous or crystalline drugs may be affected by formulating them into mesoporous drug delivery … " - Crystalline to amorphous phase transition

Crystalline to amorphous phase transition

WebDec 19, 2011 · Amorphous-Crystal Phase Transitions in Ge x Te 1-x Alloys. E. Carria 4,1,2, A. M. Mio 1, S ... The enhancement of reflectivity observed during the annealing process is due to the transition from the amorphous to the crystalline phase. The crystallization temperature of the Ge-rich alloy (dotted red line) was 354°C, higher than … WebAug 1, 2010 · The crystallization speed (v) of the amorphous ( InTe ) x ( GeTe ) ( x =0.1 , 0.3, and 0.5) films and their thermal, optical, and electrical behaviors were investigated by using a...

Did you know?

WebMay 7, 2024 · Herein, the authors present a strategy based on thermally driven amorphous−crystalline phase transition to achieve multicolor carbonized polymer dots (CPDs) with the emission color tunable from green to orange-red. This is the first report on multicolor RTP emission from CDs by means of thermal stimulus. WebSep 12, 2024 · As a result, many polymers are semi-crystalline, with regions called lamellae where portions of chains have aligned parallel to each other, but also with large amorphous areas that are much more randomly oriented. As a result, a polymer sample might be 80% amorphous with only 20% of its chain lengths aligned in crystalline …

WebDec 1, 2024 · On those lines, we present the switchable phase transition occurring between crystalline and amorphous states at shocked conditions and the results have been screened by diffraction and spectroscopic techniques. As of now, from the literature … WebJul 16, 2013 · Infrared absorption measurements of amorphous and crystalline nanoparticles of GeTe reveal a localized surface plasmon resonance (LSPR) mode in the crystalline phase that is absent in the amorphous phase. The LSPR mode emerges upon crystallization of amorphous nanoparticles. The contrasting plasmonic properties are …

WebJul 4, 2024 · The amorphous state plays a key role in porous coordination polymer and metal-organic framework phase transitions. We investigate a crystalline-to-amorphous-to … WebJun 30, 2014 · Ultrafast crystalline-to-amorphous phase transition in Ge{sub 2}Sb{sub 2}Te{sub 5} chalcogenide alloy thin film using single-shot imaging spectroscopy (Journal Article) OSTI.GOV skip to main content Sign In Create Account Show searchShow menu U.S. Department of EnergyOffice of Scientific and Technical Information

WebThe amorphous to crystalline phase transition kinetics were measured, the crystal habits were observed and the solid forms were characterized. With no HSA, a more acidic environment resulted in faster transition kinetics from amorphous CaCO 3 to calcite. However, the presence of HSA tended to slow down the transition kinetics.

WebElectronic Origin for the Phase Transition from Amorphous LixSi to Crystalline Li15Si4 ACS Nano Silicon has been widely explored as an anode material for lithium ion battery. Upon lithiation, silicon transforms to amorphous LixSi (a-LixSi) via electrochemical-driven solid-state amorphization. can russias nukes hit the usaWebJun 13, 2011 · The crystalline and amorphous GST is thus extensively studied to unravel the atomic-scale mechanism behind the utilized transition. The crystalline GST has two … flannel baby clothesWeb[26-30] These advanced applications rely on a unique combination of material properties; the rapid and reversible phase transition between the crystalline and amorphous phase of GST, ... Upon heating, the amorphous phase first crystallizes into the rocksalt-like phase with a change in bonding mechanism from CVB to MVB. can russias nukes reach the united statesWebOct 20, 2015 · Figure 4 shows the pressure dependence of G / B and at different η, spanning both sides of the transition from crystals to disordered crystals and with lines of amorphous solids at η = 0.6 as a ... can russia take over the worldWebJan 5, 2024 · Abstract. We observe the isothermal amorphous-to-crystalline transition of TiO 2 thin films deposited by reactive RF magnetron sputtering with in-situ optical microscopy at several temperatures. The crystalline fraction of single-phase anatase, brookite, and rutile films as a function of time is analyzed within the … flannel baby play matWebNov 2, 2007 · We find that all samples undergo the phase transition with crystallization temperatures close to those of similarly prepared blanket … flannel baby quilt with cut fringeWebFeb 3, 2024 · Consequently, our results point toward a process that directly transforms an amorphous precursor to a crystalline phase without morphological changes, providing … can russia start ww3