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Van der Waals interactions between flat surfaces in uniaxial anisotropic media are investigated in the nonretarded limit. The main focus is the effect of nonzero tilt between the optical axis and the surface normal on the strength of van…

软凝聚态物质 · 物理学 2018-03-13 Pavel Kornilovitch

The vertical integration of multiple two-dimensional (2D) materials in heterostructures, held together by van der Waals forces, has opened unprecedented possibilities for modifying the (opto-)electronic properties of nanodevices. Graphene,…

Molecular dynamics simulations were employed to study the wetting behavior of nanoscale aqueous hydrophilic and hydrophobic Imidazolium based ionic liquid (IL) droplets on a solid graphite substrate subjected to the perpendicular electric…

软凝聚态物质 · 物理学 2020-12-09 Sanchari Bhattacharjee , Sandip Khan

We present a novel potential model for calculating the interaction between a molecule and a single graphene sheet. The dispersion/repulsion, induction, dipole-quadrupole, quadrupole-quadrupole interactions between a fluid molecule and a…

介观与纳米尺度物理 · 物理学 2012-09-20 Xiongce Zhao

The effects of humidity on the electronic properties of quasi-free standing one layer graphene (QFS 1LG) are investigated via simultaneous magneto-transport in the van der Pauw geometry and local work function measurements in a controlled…

This article addresses the much debated question whether the degree of hydrophobicity of single-layer graphene (1LG) is different from the one of double-layer graphene (2LG). Knowledge of the water affinity of graphene and its spatial…

材料科学 · 物理学 2018-04-27 M. Munz , C. E. Giusca , R. L. Myers-Ward , D. K. Gaskill , O. Kazakova

It is argued that the van der Waals force exerted by the liquid and vapor/air on the molecules escaping from one phase into the other strongly affects the characteristics of evaporation. This is shown using two distinct descriptions of the…

软凝聚态物质 · 物理学 2024-02-14 E. S. Benilov

Interfaces are a most common motif in complex systems. To understand how the presence of interfaces affect hydrophobic phenomena, we use molecular simulations and theory to study hydration of solutes at interfaces. The solutes range in size…

软凝聚态物质 · 物理学 2014-09-05 Amish J. Patel , Patrick Varilly , Sumanth N. Jamadagni , Hari Acharya , Shekhar Garde , David Chandler

We present a density functional study of graphene adhesion on a realistic SiO$_2$ surface taking into account van der Waals (vdW) interactions. The SiO$_2$ substrate is modeled at the local scale by using two main types of surface defects,…

介观与纳米尺度物理 · 物理学 2011-08-30 A. N. Rudenko , F. J. Keil , M. I. Katsnelson , A. I. Lichtenstein

We theoretically and experimentally investigate colloid-oil-water-interface interactions of charged, sterically stabilized, poly(methyl-methacrylate) colloidal particles dispersed in a low-polar oil (dielectric constant $\epsilon=5-10$)…

The molecular water structure at charged aqueous interfaces is shaped by interfacial electric fields, which can induce significant anisotropy in the molecular orientations extending over nanometer-scale distances. Despite great relevance,…

Water confined between two graphene layers with a small separation forms a two-dimensional ice structure,with an apparent square symmetry [Algara-Siller et al., Nature (London) 519, 443 (2015)], which is poorly understood. A density…

介观与纳米尺度物理 · 物理学 2017-02-06 Niels R. Walet

We consider potential-based interactions between beams (or fibers) and shells (or membranes) using a coarse-grained approach with focus on van der Waals attraction and steric repulsion. The involved 6D integral over volumes of a beam and a…

数值分析 · 数学 2026-03-02 Aleksandar Borković , Michael H. Gfrerer , Roger A. Sauer

In the framework of the thermodynamic perturbation theory for fluids we study how the phase diagram of an isotropic repulsive soft-core attractive potential, where a liquid-liquid phase transition exists in addition to the standard…

统计力学 · 物理学 2009-11-11 Yu. D. Fomin , V. N. Ryzhov , E. E. Tareyeva

Wetting behaviour of surfaces is believed to be affected by van der Waals (vdW) forces, however, there is no clear demonstration of this. With the isolation of two-dimensional vdW layered materials it is possible to test this hypothesis. In…

We study the effective forces acting between colloidal particles trapped at a fluid interface which itself is exposed to a pressure field. To this end we apply what we call the ``force approach'', which relies solely on the condition of…

软凝聚态物质 · 物理学 2008-03-31 Alvaro Dominguez , Martin Oettel , Siegfried Dietrich

Graphene exhibits promise as a plasmonic material with high mode confinement that could enable efficient hot carrier extraction. We investigate the lifetimes and mean free paths of energetic carriers in free-standing graphene, graphite and…

材料科学 · 物理学 2016-12-28 Prineha Narang , Litao Zhao , Steven Claybrook , Ravishankar Sundararaman

We examine the competition between adhesive and bending energies for few-layered graphene samples placed on rigid, microscale-corrugated substrates. Using atomic force microscopy, we show that the graphene undergoes a sharp "snap-through"…

介观与纳米尺度物理 · 物理学 2015-05-30 Scott Scharfenberg , Nikhita Mansukhani , Cesar Chialvo , Richard L. Weaver , Nadya Mason

Water mediates electrostatic interactions via the orientation of its dipoles around ions, molecules, and interfaces. This induced water polarization consequently influences multiple phenomena. In particular, water polarization modulated by…

Mesoscale water-hydrophobic interfaces are of fundamental importance in multiple disciplines, but their molecular properties have remained elusive for decades due to experimental complications and alternate theoretical explanations.…

化学物理 · 物理学 2024-05-06 Lixue Shi , R. Allen LaCour , Xiaoqi Lang , Joseph P. Heindel , Teresa Head-Gordon , Wei Min