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Coulomb repulsion between the bonding electron pair in the H-O covalent bond (denoted by "-") and the nonbonding electron pair of O (":") and the specific-heat disparity between the O:H and the H-O segments of the entire hydrogen bond…

化学物理 · 物理学 2013-10-08 Chang Q. Sun

Recently, underscreening in concentrated electrolytes was discovered in experiments and confirmed in simulations and theory. It was found that the correlation length of the charge-charge correlations, $\lambda_s$, satisfies the scaling…

统计力学 · 物理学 2022-11-07 A. Ciach , O. Patsahan

Hydrogen-bond forms a pair of asymmetric, coupled, H-bridged oscillators with ultra-short-range interactions and memory. hydrogen bond cooperative relaxation and the associated binding electron entrapment and nonbonding electron…

软凝聚态物质 · 物理学 2015-01-16 Chang Q Sun

We examined O:H-O bond relaxation under compression,heating,molecular undercoordination and claimed a universal resolution to the best-known mysteries of water ice such as ice foating, ice slipperiness, relegation and warm water cools…

软凝聚态物质 · 物理学 2018-09-06 Yongli Huang , Xi Zhang , Chang Q Sun

Water is the liquid of life, thanks to its three-dimensional adaptive hydrogen (H)-bond network. Confinement of this network may lead to dramatic structural changes that influence chemical and physical transformations. Although confinement…

化学物理 · 物理学 2022-10-12 N. Dupertuis , O. B. Tarun , C. Lütgebaucks , S. Roke

A broad variety of liquids conform to density scaling: relaxation times expressed as a function of the ratio of temperature to density, the latter raised to a material constant {\gamma}. For atomic liquids interacting only through simple…

软凝聚态物质 · 物理学 2019-06-26 D. Fragiadakis , C. M. Roland

The scaling of the bond-bond correlation function $C(s)$ along linear polymer chains is investigated with respect to the curvilinear distance, $s$, along the flexible chain and the monomer density, $\rho$, via Monte Carlo and molecular…

软凝聚态物质 · 物理学 2009-11-10 J. P. Wittmer , H. Meyer , J. Baschnagel , A. Johner , S. Obukhov , L. Mattioni , M. Mueller , A. N. Semenov

The Bernal-Fowler ice rules stipulate that each water molecule in an ice crystal should form four hydrogen bonds. However, in extreme or constrained conditions, the arrangement of water molecules deviates from conventional ice rules,…

Small molecules that interact strongly with water were the subject of this molecular dynamics (MD) study. These solutes include a cryoprotectant (DMSO), a polyalcohol [CH$_2$(OH)$_2$], carboxylic acid conjugates (HCOOH and HCOONa), an…

化学物理 · 物理学 2025-08-06 Benjamin M. Harless , Jasmine K. Sindelar , J. Daniel Gezelter

We address a recent conjecture according to which the relaxation time $\tau$ of a viscous liquid obeys density scaling ($\tau=F(\rho^\gamma/T)$ where $\rho$ is density) if the liquid is ``strongly correlating,'' i.e., has almost 100%…

软凝聚态物质 · 物理学 2012-03-27 Thomas B. Schrøder , Ulf R. Pedersen , Jeppe C. Dyre

Monte Carlo computer simulations in the canonical and grand canonical statistical ensemble were used to explore the properties of the central force (CF1) water model. The intramolecular structure of the H$_2$O molecule is well reproduced by…

软凝聚态物质 · 物理学 2021-10-12 V. Ravnik , B. Hribar-Lee , O. Pizio , M. Luksic

We derive a low-scaling $G_0W_0$ algorithm for molecules, using pair atomic density fitting (PADF) and an imaginary time representation of the Green's function and describe its implementation in the Slater type orbital (STO) based Amsterdam…

化学物理 · 物理学 2020-11-13 Arno Förster , Lucas Visscher

Water is detected in environments representing every stage of star and solar system formation, but its chemical evolution throughout these stages remains poorly constrained. Deuterium ratios offer a means of probing chemical links between…

We study the effect of salts on the thickness of wetting films on melting ice and interactions acting on CO$_2$ bubble near ice-water and vapor-water interfaces. Governing mechanisms are the Lifshitz and the double-layer interactions in the…

软凝聚态物质 · 物理学 2016-08-03 P. Thiyam , E. R. A. Lima , O. I. Malyi , D. F. Parsons , S. Y. Buhmann , C. Persson , M. Boström

Viscosities and their temperature, T, and volume, V, dependences are reported for 7 molecular liquids and polymers. In combination with literature viscosity data for 5 other liquids, we show that the superpositioning of relaxation times for…

软凝聚态物质 · 物理学 2009-11-11 CM Roland , S Bair , R Casalini

Skins of water and ice share the same attribute of supersolidity characterized by the identical H-O vibration frequency of 3450 cm-1. Molecular undercoordination and inter-electron-pair repulsion shortens the H-O bond and lengthen the O:H…

化学物理 · 物理学 2014-09-26 Xi Zhang , Yongli Huang , Zengsheng Ma , Yichun Zhou , Weitao Zheng , Ji Zhou , Chang Q. Sun

Proton ordering in water ice is a paradigmatic order-disorder transition in a locally constrained system. The ice rules require exactly two hydrogens close to each oxygen, restricting the disorder to an exponentially large yet strongly…

材料科学 · 物理学 2026-03-11 Qi Zhang , Sicong Wan , Lei Wang

Scaling law for geometrical and dynamical quantities of biological molecules is an interesting topic. According to Flory's theory, a power law between radius of gyration and the length of homopolymer chain is found, with exponent 3/5 for…

生物物理 · 物理学 2007-11-26 Liu Hong , Jinzhi Lei

The interplay between intra-molecular H-O covalent bond contraction, due to molecular under-coordination, and inter-molecular O:H expansion, due to inter-electron pair Coulomb repulsion, has been shown to be the source of the anomalous…

化学物理 · 物理学 2013-10-08 Chang Q. Sun

Dielectric spectra (10^4-10^11 Hz) of water and ice at 0 {\deg}C are considered in terms of proton conductivity and compared to each other. In this picture, the Debye relaxations, centered at 1/{\tau}_W ~ 20 GHz (in water) and 1/{\tau}_I ~…

软凝聚态物质 · 物理学 2020-05-19 V. G. Artemov , A. A. Volkov
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