The isotropic-nematic interface of colloidal goethite in an external magnetic field

被引：12

作者：

van den Pol, E. ^{[1
]}

Lupascu, A. ^{[2
]}

Davidson, P. ^{[3
]}

Vroege, G. J. ^{[1
,2
]}

机构：

[1] Univ Utrecht, Debye Inst Nanomat Sci, Vant Hoff Lab Phys & Colloid Chem, NL-3584 CH Utrecht, Netherlands

[2] Univ Utrecht, Univ Coll Utrecht, NL-3584 ED Utrecht, Netherlands

[3] Univ Paris 11, UMR CNRS 8502, Phys Solides Lab, F-91405 Orsay, France

来源：

JOURNAL OF CHEMICAL PHYSICS | 2010年 / 133卷 / 16期

关键词：

ALPHA-FEOOH NANORODS; AQUEOUS SUSPENSIONS; PHYSICAL-PROPERTIES; PHASE-TRANSITION; LIQUID-CRYSTALS; DISPERSIONS;

D O I：

10.1063/1.3498738

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polarization microscopy was used to study the behavior around the isotropic-nematic interface of colloidal goethite dispersions in a magnetic field. It has been found before that the nematic phase is favored in an external field. In the case of goethite this was also observed; nematic droplets formed inside the isotropic phase and coalesced with the nematic phase. However, the behavior was found to be much richer because of the particle rotation around a certain critical field strength. The simultaneous occurrence of (parallel)nematic-(perpendicular)nematic phase separation under the influence of a magnetic field also plays a role here. (C) 2010 American Institute of Physics. [doi:10.1063/1.3498738]

引用

页数：7

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