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Water dissociation represents one of the most important reactions in catalysis, essential to the surface and nano sciences [e.g., Hass et al., Science, 1998, 282, 265-268; Brown et al., Science 2001, 294, 67-69; Bikondoa et al., Nature…

Friction at water-carbon interfaces remains a major puzzle with theories and simulations unable to explain experimental trends in nanoscale waterflow. A recent theoretical framework -- quantum friction (QF)-- proposes to resolve these…

软凝聚态物质 · 物理学 2023-01-10 Anna T. Bui , Fabian L. Thiemann , Angelos Michaelides , Stephen J. Cox

We investigate the curvature-dependence of water dynamics in the vicinity of hydrophobic spherical solutes using molecular dynamics simulations. For both, the lateral and perpendicular diffusivity as well as for H-bond kinetics of water in…

软凝聚态物质 · 物理学 2016-01-22 R. Gregor Weiß , Matthias Heyden , Joachim Dzubiella

We investigate the structural properties of liquid water at near ambient conditions using first-principles molecular dynamics simulations based on a semilocal density functional augmented with nonlocal van der Waals interactions. The…

软凝聚态物质 · 物理学 2016-08-01 Giacomo Miceli , Stefano de Gironcoli , Alfredo Pasquarello

Parametrizing energy functions for ionic systems can be challenging. Here, the total energy function for an eutectic system consisting of water, SCN$^-$, K$^+$ and acetamide is improved vis-a-vis experimentally measured properties. Given…

化学物理 · 物理学 2024-10-25 Kai Töpfer , Eric Boittier , Michael Devereux , Andrea Pasti , Peter Hamm , Markus Meuwly

Imidazoline-based nitroxide radicals are often used as spin probes for medium acidity and polarity in different systems. In this work, using the density functional theory (DFT) approach, we have studied how physico-chemical characteristics…

原子与分子团簇 · 物理学 2016-09-28 Larissa N. Ikryannikova , Leila Yu. Ustynyuk , Alexander N. Tikhonov

Prior studies on the effects of surface chemistry of detonation nanodiamonds (DNDs) on Hydrogen Bonds (HBs) of water have not unambiguously distinguished among three broad categories of HBs: water-site HBs (HB$^{(s)}$), water-water HBs in…

计算物理 · 物理学 2021-03-03 Farshad Saberi-Movahed , Donald W Brenner

Fundamental studies of the effect of specific ions on hydrophobic interactions are driven by the need to understand phenomena such as hydrophobically driven self-assembly or protein folding. Using beta-peptide-inspired nano-rods, we…

化学物理 · 物理学 2016-08-08 Kai Huang , Sebastian Gast , C. Derek Ma , Nicholas L. Abbott , Izabela Szlufarska

We have parameterized a reactive force field (ReaxFF) for lithium aluminum silicates using density functional theory (DFT) calculations of structural properties of a number of bulk phase oxides, silicates, and aluminates, as well as of…

Transition metal dichalcogenides (TMDs) are a class of two-dimensional (2D) materials been widely studied for emerging electronic properties. In this work, we use computational simulations to examine the water adsorption on TMDs…

计算物理 · 物理学 2024-02-20 Siheng Li , Keyang Liu , Jiří Klimeš , Ji Chen

Even though atomistic and coarse-grained (CG) models have been used to simulate liquid nanodroplets in vapor, very few rigorous studies of the liquid-liquid interface structure are available, and most of them are limited to planar…

化学物理 · 物理学 2019-07-16 Peiyuan Gao , Xiu Yang , Alexandre M. Tartakovsky

We report electronic structure calculations within density functional theory for the hydrated superconductor Na_{1/3}CoO_2(1.33)H_2O and compare the results with the parent compound Na_{0.3}CoO_2. We find that the intercalation of water…

超导电性 · 物理学 2007-05-23 M. D. Johannes D. J. Singh

Molecular adsorption on surfaces plays a central role in catalysis, corrosion, desalination, and many other processes of relevance to industry and the natural world. Few adsorption systems are more ubiquitous or of more widespread…

Hydrophobic interactions provide driving forces for protein folding, membrane formation, and oil-water separation. Motivated by information theory, the poorly understood nonpolar solute interactions in water are investigated. A simple…

chem-ph · 物理学 2008-02-03 G. Hummer , S. Garde , A. E. Garcia , A. Pohorille , L. R. Pratt

Three dimensional implementations of liquid state theories offer an efficient alternative to computer simulations for the atomic-level description of aqueous solutions in complex environments. In this context, we present a (classical)…

化学物理 · 物理学 2013-02-13 Guillaume Jeanmairet , Maximilien Levesque , Rodolphe Vuilleumier , Daniel Borgis

Interfacial water on transition metal oxides such as TiO$_2$ has been widely studied because of their structural complexity and scientific relevance in e.g. photocatalysis and ice growth. Using ab initio molecular dynamics, we find that…

材料科学 · 物理学 2021-11-02 Keyang Liu , Jianqing Guo , Weizhong Fu , Ji Chen

The mechanism of cold- and pressure-denaturation are matter of debate. Some models propose that when denaturation occurs more hydrogen bonds between the molecules of hydration water are formed. Other models identify the cause in the density…

生物物理 · 物理学 2010-11-17 Valentino Bianco , Svilen Iskrov , Giancarlo Franzese

Site density functional theory (SDFT) provides a rigorous framework for statistical mechanics analysis of inhomogeneous molecular liquids. The key defining feature of these systems is the presence of two very distinct interactions scales…

统计力学 · 物理学 2020-11-24 Gennady N. Chuev , Marina V. Fedotova , Marat Valiev

The crystalline structure of minerals due to the highly ordered assembly of its constituent atoms, ions or molecules confers a considerable hardness and brittleness to the materials. As a result, they are generally subject to fracture. Here…

The structure of dilute electrolyte solutions close to a surface carrying a spatially inhomogeneous surface charge distribution is investigated by means of classical density functional theory (DFT) within the approach of fundamental measure…

软凝聚态物质 · 物理学 2020-06-23 Maximilian Mußotter , Markus Bier , S. Dietrich