scholarly journals Communication: Diffusion constant in supercooled water as the Widom line is crossed in no man’s land

2018 ◽  
Vol 148 (19) ◽  
pp. 191102 ◽  
Author(s):  
Yicun Ni ◽  
Nicholas J. Hestand ◽  
J. L. Skinner
Keyword(s):  
Diffusion Constant ◽  
Supercooled Water ◽  
Widom Line ◽  
No Man's Land

Ice-Amorphization of Supercooled Water Nanodroplets in No Man’s Land

2017 ◽  
Vol 1 (4) ◽  
pp. 187-196 ◽  
Author(s):  
Prithwish K. Nandi ◽  
Christian J. Burnham ◽  
Zdenek Futera ◽  
Niall J. English
Keyword(s):  
Supercooled Water ◽  
No Man's Land

scholarly journals Аномалия микроволнового поглощения льда вблизи -45-=SUP=-o-=/SUP=-C при пластической деформации

2019 ◽  
Vol 89 (3) ◽  
pp. 452
Author(s):  
Г.С. Бордонский
Keyword(s):  
Plastic Deformation ◽  
Phase Space ◽  
Critical Point ◽  
Microwave Absorption ◽  
Atmospheric Pressure ◽  
Supercooled Water ◽  
Measuring Technique ◽  
Temperature Phase ◽  
Widom Line ◽  
Radiation Transmission

AbstractThe microwave absorption of fresh ice subjected to plastic deformation when changing temperature from 0 to –60°C has been measured. A decrease in the losses of radiation transmission through ice at frequencies of 32 and 125 GHz with extremum at a temperature of –45°C was found. This temperature corresponds to the point at atmospheric pressure at the Widom line, which starts from a hypothetic second critical point in pressure–temperature phase space. The used measuring technique makes it possible to obtain layers of deeply supercooled water into ice and study the position of the Widom line and second critical point in phase space.

scholarly journals Origin of the emergent fragile-to-strong transition in supercooled water

2018 ◽  
Vol 115 (38) ◽  
pp. 9444-9449 ◽  
Author(s):  
Rui Shi ◽  
John Russo ◽  
Hajime Tanaka
Keyword(s):  
Experimental Data ◽  
Glass Transition ◽  
Supercooled Water ◽  
Arrhenius Law ◽  
Widom Line ◽  
Slowing Down ◽  
Strong Transition ◽  
Dynamical Properties ◽  
Water Models ◽  
Insight Into

Liquids can be broadly classified into two categories, fragile and strong ones, depending on how their dynamical properties change with temperature. The dynamics of a strong liquid obey the Arrhenius law, whereas the fragile one displays a super-Arrhenius law, with a much steeper slowing down upon cooling. Recently, however, it was discovered that many materials such as water, oxides, and metals do not obey this simple classification, apparently exhibiting a fragile-to-strong transition far above Tg. Such a transition is particularly well known for water, and it is now regarded as one of water’s most important anomalies. This phenomenon has been attributed to either an unusual glass transition behavior or the crossing of a Widom line emanating from a liquid–liquid critical point. Here by computer simulations of two popular water models and through analyses of experimental data, we show that the emergent fragile-to-strong transition is actually a crossover between two Arrhenius regimes with different activation energies, which can be naturally explained by a two-state description of the dynamics. Our finding provides insight into the fragile-to-strong transition observed in a wide class of materials.

scholarly journals Free energy of formation of small ice nuclei near the Widom line in simulations of supercooled water

2015 ◽  
Vol 38 (5) ◽  
Author(s):  
Connor R. C. Buhariwalla ◽  
Richard K. Bowles ◽  
Ivan Saika-Voivod ◽  
Francesco Sciortino ◽  
Peter H. Poole
Keyword(s):  
Free Energy ◽  
Supercooled Water ◽  
Widom Line ◽  
Ice Nuclei ◽  
Free Energy Of Formation ◽  
Energy Of Formation

scholarly journals Structural relaxation and crystallization in supercooled water from 170 to 260 K

2021 ◽  
Vol 118 (14) ◽  
pp. e2022884118
Author(s):  
Loni Kringle ◽  
Wyatt A. Thornley ◽  
Bruce D. Kay ◽  
Greg A. Kimmel
Keyword(s):  
Structural Relaxation ◽  
Energy Landscape ◽  
Supercooled Water ◽  
Amorphous Solid ◽  
Equilibrium Structure ◽  
Crystallization Time ◽  
Initial Structure ◽  
Potential Energy Landscape ◽  
Exponential Relaxation ◽  
No Man's Land

The origin of water’s anomalous properties has been debated for decades. Resolution of the problem is hindered by a lack of experimental data in a crucial region of temperatures, T, and pressures where supercooled water rapidly crystallizes—a region often referred to as “no man’s land.” A recently developed technique where water is heated and cooled at rates greater than 109 K/s now enables experiments in this region. Here, it is used to investigate the structural relaxation and crystallization of deeply supercooled water for 170 K < T < 260 K. Water’s relaxation toward a new equilibrium structure depends on its initial structure with hyperquenched glassy water (HQW) typically relaxing more quickly than low-density amorphous solid water (LDA). For HQW and T > 230 K, simple exponential relaxation kinetics is observed. For HQW at lower temperatures, increasingly nonexponential relaxation is observed, which is consistent with the dynamics expected on a rough potential energy landscape. For LDA, approximately exponential relaxation is observed for T > 230 K and T < 200 K, with nonexponential relaxation only at intermediate temperatures. At all temperatures, water’s structure can be reproduced by a linear combination of two, local structural motifs, and we show that a simple model accounts for the complex kinetics within this context. The relaxation time, τrel, is always shorter than the crystallization time, τxtal. For HQW, the ratio, τxtal/τrel, goes through a minimum at ∼198 K where the ratio is about 60.

scholarly journals Relation between the Widom line and the breakdown of the Stokes-Einstein relation in supercooled water

2007 ◽  
Vol 104 (23) ◽  
pp. 9575-9579 ◽  
Author(s):  
P. Kumar ◽  
S. V. Buldyrev ◽  
S. R. Becker ◽  
P. H. Poole ◽  
F. W. Starr ◽  
...  
Keyword(s):  
Supercooled Water ◽  
Einstein Relation ◽  
Widom Line

scholarly journals Growth rate of crystalline ice and the diffusivity of supercooled water from 126 to 262 K

2016 ◽  
Vol 113 (52) ◽  
pp. 14921-14925 ◽  
Author(s):  
Yuntao Xu ◽  
Nikolay G. Petrik ◽  
R. Scott Smith ◽  
Bruce D. Kay ◽  
Greg A. Kimmel
Keyword(s):  
Growth Rate ◽  
Pulsed Laser ◽  
Supercooled Water ◽  
Supercooled Liquid ◽  
Self Diffusion ◽  
Temperature Dependences ◽  
No Man's Land ◽  
Pulsed Laser Heating ◽  
Isothermal Measurements ◽  
Previous Prediction

Understanding deeply supercooled water is key to unraveling many of water’s anomalous properties. However, developing this understanding has proven difficult due to rapid and uncontrolled crystallization. Using a pulsed-laser–heating technique, we measure the growth rate of crystalline ice, G(T), for 180 K < T < 262 K, that is, deep within water’s “no man’s land” in ultrahigh-vacuum conditions. Isothermal measurements of G(T) are also made for 126 K ≤ T ≤ 151 K. The self-diffusion of supercooled liquid water, D(T), is obtained from G(T) using the Wilson–Frenkel model of crystal growth. For T > 237 K and P ∼ 10−8 Pa, G(T) and D(T) have super-Arrhenius (“fragile”) temperature dependences, but both cross over to Arrhenius (“strong”) behavior with a large activation energy in no man’s land. The fact that G(T) and D(T) are smoothly varying rules out the hypothesis that liquid water’s properties have a singularity at or near 228 K at ambient pressures. However, the results are consistent with a previous prediction for D(T) that assumed no thermodynamic transitions occur in no man’s land.

Enhanced small-angle scattering connected to the Widom line in simulations of supercooled water

2011 ◽  
Vol 134 (21) ◽  
pp. 214506 ◽  
Author(s):  
K. T. Wikfeldt ◽  
C. Huang ◽  
A. Nilsson ◽  
L. G. M. Pettersson
Keyword(s):  
Small Angle ◽  
Supercooled Water ◽  
Small Angle Scattering ◽  
Widom Line ◽  
Angle Scattering
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