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带电粒子形成胶体晶体的有效硬球模型判据的计算机模拟验证
Alternative TitleA Brownian dynamic simulation to verify the effective hard-sphere model criterion for the formation of charged colloidal crystals
顾凌云; 徐升华; 孙祉伟
Source Publication物理学报=Acta Physica Sinica
2011-12-15
Volume60Issue:12Pages:411-420
ISSN1000-3290
Abstract在对胶体晶体的研究中,带电粒子胶体晶体的形成机理比硬球胶体晶体更加复杂,对其形成条件目前还缺少有效的判断依据.有效硬球模型判据提出以有效直径作为判断参数.为了验证该判据的有效性,利用布朗动力学模拟研究了不同有效直径下带电粒子胶体晶体的特性.为了更加定量地研究单因素对带电胶体晶体形成的影响,取有效直径为2.8至0.8,并对一定的有效直径,研究了粒子几何直径和排斥力不同情况下的结晶行为.在布朗动力学模拟过程中,采用径向分布函数和键序参数方法检测体系的结构变化,并分析所形成的晶体结构.结果表明,在判断带电粒子胶体体系能否形成有序结构方面,有效硬球模型判据有一定的合理性.但是,并不能将有效直径作为唯一的判别参数,而是需要综合其他参数的影响,这显示出该判据的片面性.
Other AbstractThe mechanism for the formation of colloidal crystals in charge-stabilized colloids is more complicated than that of hard-sphere colloidal crystals.And there is still lack of available criterion for the formation of charged colloidal crystals.The effective hard-sphere model suggests a criterion in which the effective diameter is used as a crucial parameter.In order to test the validity of this criterion,the characteristics of charged colloidal crystals with different effective diameters are investigated using Brownian dynamics simulations in this study.The crystallization behaviors with different geometric particle diameters and repulsive forces are also studied with some fixed effective diameters.In the simulation,the time evolution of crystallization process and the crystal structure during the simulation are characterized by means of the radial distribution functions and bond-order parameters.The results show that the effective hard-sphere model criterion has its reasonableness to some extent.However,the effective diameter cannot be used as the only parameter that influences the formation of charged colloidal crystals.The influence of other parameters should also be taken into account,which indicates that the criterion is one-sided. 更多
Keyword布朗动力学模拟 有效硬球模型 带电胶体晶体 Brownian Dynamics Simulations Charged Colloidal Crystals Effective Hard-sphere Model Range Attractive Interaction Monte-carlo Crystallization Particles Suspensions Nucleation Mixtures Systems Physics
Subject Area力学
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Indexed BySCI ; CSCD
Language中文
WOS IDWOS:000299359800057
Funding Organization国家自然科学基金(批准号:10972217,11032011);中国科学院知识创新工程重要方向性项目(批准号:KJCX2-YW-L08)资助的课题~~
CSCD IDCSCD:4394936
DepartmentNML复杂流体
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/45121
Collection国家微重力实验室
Corresponding Author顾凌云
Recommended Citation
GB/T 7714
顾凌云,徐升华,孙祉伟. 带电粒子形成胶体晶体的有效硬球模型判据的计算机模拟验证[J]. 物理学报=Acta Physica Sinica,2011,60(12):411-420.
APA 顾凌云,徐升华,&孙祉伟.(2011).带电粒子形成胶体晶体的有效硬球模型判据的计算机模拟验证.物理学报=Acta Physica Sinica,60(12),411-420.
MLA 顾凌云,et al."带电粒子形成胶体晶体的有效硬球模型判据的计算机模拟验证".物理学报=Acta Physica Sinica 60.12(2011):411-420.
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