Isotropic compression of colloidal crystal in electric field between plate electrode

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	Isotropic compression of colloidal crystal in electric field between plate electrode
	Li, XL ; Lu, Y ; Zhai, YL ; Wu, LS ; Sun, W ; Hu, SX
刊名	ACTA PHYSICA SINICA
	2013
卷号	62 期号:17
关键词	colloidal crystal Kossel line structual changes
ISSN号	1000-3290
通讯作者	Hu, SX (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	Colloidal crystals composed of polystyrene micro-spheres (negatively charged, with a diameter of 300 nm) are fabricated by injecting aqueous suspensions of the micro-spheres with different volume fractions into sample cells which are made by gluing together two glass plates. Whose surfaces are coated with conductive films. The colloidal crystals have a face-centered-cubic structure with their (111) planes parallel to the surface of the sample cells. Laser diffraction is used to measure the structural changes of the colloidal crystals in an electric field. Structures of the colloidal crystals are characterized by using the Kossel-line method. It is found that the colloidal crystals are compressed isotropically in the electrical field. The lattice constants of the colloidal crystals decrease with the increase of the electric field, maintaining their face-centered-cubic structure. Results can be explained by the combined action of the electric field force, electrostatic repulsion and electrohydrodynamic force. The electric field makes all of the micro-spheres migrate to the positive plate of the sample cell and leads to a compression in the direction along the electric field. Then the electrohydrodynamic force produces an attractive interaction between the micro-spheres in the direction perpendicular to the electric field.
资助信息	China Manned Space Engineering; National Natural Science Foundation of China [10904164, 11104328]
语种	中文
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57140]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Li, XL,Lu, Y,Zhai, YL,et al. Isotropic compression of colloidal crystal in electric field between plate electrode[J]. ACTA PHYSICA SINICA,2013,62(17).
APA	Li, XL,Lu, Y,Zhai, YL,Wu, LS,Sun, W,&Hu, SX.(2013).Isotropic compression of colloidal crystal in electric field between plate electrode.ACTA PHYSICA SINICA,62(17).
MLA	Li, XL,et al."Isotropic compression of colloidal crystal in electric field between plate electrode".ACTA PHYSICA SINICA 62.17(2013).