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Diffusiophoresis (DP) refers to the migration of particles driven by a solute concentration gradient in a liquid. Observations in the case of molecular neutral solutes are rather scarce, due to the low drift velocities in dilute solutions,…

We report on atomistic simulations of DPPC lipid monolayers using the CHARMM36 lipid force field and four-point OPC water model. The entire two-phase region where domains of the `liquid-condensed' (LC) phase coexist with domains of the…

软凝聚态物质 · 物理学 2019-03-18 S. Panzuela , D. P. Tieleman , L. Mederos , E. Velasco

The study of the structural behaviour of pure and multi-component lipids at various temperatures and the interaction of these multi-component lipids with pharmaceutically important drugs carry huge importance. Here, we investigated the…

软凝聚态物质 · 物理学 2021-03-26 Prantar Dutta , Debabrata Pramanik , Jayant K. Singh

Understanding dielectric spectra can reveal important information about the dynamics of solvents and solutes from the dipolar relaxation times down to electronic ones. In the late 1970s, Hubbard and Onsager predicted that adding salt ions…

软凝聚态物质 · 物理学 2015-06-19 Marcello Sega , Sofia Kantorovich , Christian Holm , Axel Arnold

Using classical density functional theory (DFT) in a modified mean-field approximation we investigate the fluid phase behavior of quasi-two dimensional dipolar fluids confined to a plane. The particles carry three-dimensional dipole moments…

统计力学 · 物理学 2013-06-18 R. Geiger , S. H. Klapp

Broadband dielectric spectroscopy (BDS) of pure 5OCB and nanocolloids consisting of 5OCB and paraelectric or ferroelectric BaTiO${_3}$ nanoparticles (NPs) was performed on varying pressure or temperature. We found strong impact of NPs on…

软凝聚态物质 · 物理学 2017-08-16 S. Starzonek , S. J. Rzoska , A. Drozd-Rzoska , Krzysztof Czupryński , S. Kralj

This study investigates the interfacial tension, fluid mobility, and crystallization behavior of various saline and additive-modified solutions in a microfluidic chip environment, simulating pore-scale processes during CO2 injection. The…

A molecular model is proposed of a bilayer consisting of fully saturated DPPC and mono unsaturated DOPC. The model not only encompasses the constant density within the hydrophobic core of the bilayer, but also the tendency of chain segments…

生物物理 · 物理学 2009-11-10 R. Elliott , K. Katsov , M. Schick , I. Szleifer

Clay minerals are ubiquitous in nature, and the manner in which they interact with their surroundings has important industrial and environmental implications. Consequently, a molecular-level understanding of the adsorption of molecules on…

We investigate in this paper the ground state and the nature of the transition from an orientational ordered phase at low temperature to the disordered state at high temperature in a molecular crystal. Our model is a Potts model which takes…

统计力学 · 物理学 2015-06-03 Danh-Tai Hoang , H. T. Diep

The electric dipole moments of $(H_{2}O)_{n}DCl$ ($n=3-9$) clusters have been measured by the beam deflection method. Reflecting the (dynamical) charge distribution within the system, the dipole moment contributes information about the…

原子与分子团簇 · 物理学 2015-02-06 Nicholas Guggemos , Petr Slavíček , Vitaly V. Kresin

We analyze the dependence of cooperativity of the thermal denaturation transition and folding rates of globular proteins on the number of amino acid residues, $N$, using lattice models with side chains,off-lattice Go models and the…

生物大分子 · 定量生物学 2016-09-28 Maksim Kouza , Mai Suan Li , Edward P. O'Brien , Chin-Kun Hu , D. Thirumalai

To understand the performance of popular density-functional theory (DFT) exchange-correlation (xc) functionals in simulations of liquid water, water monomers and dimers were extracted from a PBE simulation of liquid water and examined with…

材料科学 · 物理学 2009-10-21 Biswajit Santra , Angelos Michaelides , Matthias Scheffler

Differential microcalorimetric measurements have been performed in aqueous dispersions of dimyristoylphosphatidylcholine (DMPC) multilamellar vesicles in a wide range of temperatures covering the whole transition between the lamellar gel…

软凝聚态物质 · 物理学 2007-05-23 Dmitry P. Kharakoz , Maria S. Panchelyuga , Elizaveta I. Tiktopulo , Elena A. Shlyapnikova

Osmotic coefficients, individual and mean activity coefficients of primitive model electrolyte solutions are computed at different molar concentrations using the symmetric Poisson-Boltzmann and modified Poisson-Boltzmann theories. The…

统计力学 · 物理学 2018-06-27 A. O. Quiñones , L. B. Bhuiyan , C. W. Outhwaite

Noncontact Atomic Force Microscopy and synchrotron x-ray scattering measurements on dotriacontane (n-C32H66 or C32) films adsorbed on SiO2-coated Si(100) wafers reveal a narrow temperature range near the bulk C32 melting point Tb in which a…

软凝聚态物质 · 物理学 2007-05-23 M. Bai , K. Knorr , M. J. Simpson , S. Trogisch , H. Taub , S. N. Ehrlich , H. Mo , U. G. Volkmann , F. Y. Hansen

Although the classical density functional theory (DFT) of inhomogeneous fluids was formulated more than four decades ago, its application to broken symmetry phases of molecular systems remained a challenge. Approximate free energy…

统计力学 · 物理学 2026-05-19 Yashwant Singh

Van der Waals hosts intercalated with transition metal (TM) ions exhibit a range of magnetic properties strongly influenced by the structural order of the intercalants. However, predictive computational models for the intercalant ordering…

Precise prediction of phase diagrams in molecular dynamics (MD) simulations is challenging due to the simultaneous need for long time scales, large length scales and accurate interatomic potentials. We show that thermodynamic integration…

材料科学 · 物理学 2023-06-06 Tanooj Shah , Kamron Fazel , Jie Lian , Liping Huang , Yunfeng Shi , Ravishankar Sundararaman

Starting with a model Hamiltonian, we study using the uniform expansion method conformational behavior of polyelectrolytes in the presence and absence of salt. The uniform expansion method yields all the important local length scales in the…

统计力学 · 物理学 2009-09-22 Souvik De , Arti Dua