关于软物质系统中的洛伦兹局部电场。

On the Lorentz local electric field in soft-matter systems.

作者信息

Tan P, Tian W J, Zhou L W, Huang J P

机构信息

Department of Physics and Surface Physics Laboratory (National Key Laboratory), Fudan University, Shanghai 200433, China.

出版信息

J Phys Chem B. 2009 Apr 23;113(16):5412-7. doi: 10.1021/jp8102035.

DOI:10.1021/jp8102035

PMID:19331326

Abstract

In electric-field-responsive soft-matter systems, the suspended particles respond to the Lorentz local field (LLF), yielding abundant important phenomena. Even though the particles can easily rotate, the LLF was conventionally adopted as a quantity that is independent of rotations in the literature. In contrast, here we design an experiment to measure the LLF between two metallic spheres, one of which is rotating, and report a rotation-driven reduction. Excellent agreement between our experiment and theory reveals the role of the relaxation of dipole moments. Its relevance to biophysics, colloidal physics, and nonlinear physics is also discussed.

摘要

在电场响应软物质系统中，悬浮颗粒对洛伦兹局部场（LLF）作出响应，产生了许多重要现象。尽管颗粒可以轻松旋转，但在文献中，传统上采用的LLF是一个与旋转无关的量。相比之下，我们在此设计了一个实验来测量两个金属球之间的LLF，其中一个金属球在旋转，并报告了旋转驱动的减小。我们的实验与理论之间的出色一致性揭示了偶极矩弛豫的作用。还讨论了其与生物物理学、胶体物理学和非线性物理学的相关性。