Influence of the surface charge on the homogeneity of colloidal crystals

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	Influence of the surface charge on the homogeneity of colloidal crystals
	Zhou HW(周宏伟); Xu SH(徐升华); Ouyang WZ(欧阳文泽); Sun ZW(孙祉伟); Liu LX(刘丽霞); Xu, SH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Micrograv, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
发表期刊	JOURNAL OF CHEMICAL PHYSICS
	2013-08-14
卷号	139 期号:6 页码:064904/1-064904/7
ISSN	0021-9606
摘要	Five groups of suspensions composed of polystyrene particles, having similar size but different effective surface charge, were adopted to investigate the effects of surface charge and volume fraction on the homogeneity of colloidal crystals through checking the difference between D-exp and D-uni by reflection spectroscopy method (D-exp, D-uni are the experimental and the expected value of the average nearest neighbor interparticle distance by assuming a uniform structure, respectively). We found volume fractions (ranging from 0.006 to 0.02) and structure types basically have no influence on the values of D-exp/D-uni. Moreover, for crystals formed by lowly charged particles, D-exp/D-uni is approximately equal to 1, implying the crystals are homogeneous. With the increase of effective surface charge, D-exp gradually deviates from D-uni and the formed crystals become inhomogeneous. Our experimental observations are in accordance with the previous simulation results. Additionally, we also found D-exp/D-uni initially drops quickly with increasing effective surface charge and then it tends to an asymptotic value (similar to 0.85), it is supposedly due to the saturation of effective charge. Our relevant computer simulations confirmed that the study scheme that using D-exp/D-uni as an indicator to assess the homogeneity of crystal structure is tenable and the simulation results are consistent with experiments.
学科领域	物理力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000323177900051
项目资助者	National Natural Science Foundation of China (NNSFC) [11172302, 10972217, 11032011, 20903112]
课题组名称	NML复杂流体
论文分区	二类/Q1
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47414
专题	微重力重点实验室
通讯作者	Xu, SH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Micrograv, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Zhou HW,Xu SH,Ouyang WZ,et al. Influence of the surface charge on the homogeneity of colloidal crystals[J]. JOURNAL OF CHEMICAL PHYSICS,2013,139,6,:064904/1-064904/7.
APA	Zhou HW,Xu SH,Ouyang WZ,Sun ZW,Liu LX,&Xu, SH .(2013).Influence of the surface charge on the homogeneity of colloidal crystals.JOURNAL OF CHEMICAL PHYSICS,139(6),064904/1-064904/7.
MLA	Zhou HW,et al."Influence of the surface charge on the homogeneity of colloidal crystals".JOURNAL OF CHEMICAL PHYSICS 139.6(2013):064904/1-064904/7.

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