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带电硬球柱体的计算机模拟

Computer simulation of charged hard spherocylinders.

作者信息

Avendaño Carlos, Gil-Villegas Alejandro, González-Tovar Enrique

机构信息

Facultad de Química, Universidad de Guanajuato, Noria Alta s/n, 36050 Guanajuato, Guanajuato, Mexico.

出版信息

J Chem Phys. 2008 Jan 28;128(4):044506. doi: 10.1063/1.2823736.

Abstract

In this work we present a computer simulation study of charged hard spherocylinders of aspect ratio L/sigma=5, using NVT and NPT Monte Carlo methods. Coulombic interactions are handled using the Wolf method [D. Wolf, P. Keblinski, S. R. Phillpot, and J. Eggebrecht, J. Chem. Phys. 110, 8254 (1999)]. Thermodynamic and structural properties are in excellent agreement with the results obtained with the standard Ewald summation method. A partial prediction of the corresponding phase diagram is obtained by studying two isotherms of this system. The stability of the liquid crystalline phases is examined and compared with the phase diagrams of neutral hard spherocylinders and dipolar hard spherocylinders.

摘要

在这项工作中,我们使用NVT和NPT蒙特卡罗方法,对长径比L/σ = 5的带电硬球柱体进行了计算机模拟研究。库仑相互作用采用沃尔夫方法处理[D. 沃尔夫、P. 凯布利斯基、S. R. 菲尔波特和J. 埃格布雷希特,《化学物理杂志》110, 8254 (1999)]。热力学和结构性质与用标准埃瓦尔德求和方法得到的结果非常吻合。通过研究该系统的两条等温线,得到了相应相图的部分预测。研究了液晶相的稳定性,并与中性硬球柱体和偶极硬球柱体的相图进行了比较。

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