Electric forces among nanospheres in a dielectric host
Electric forces among nanospheres in a dielectric host
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DOI：
10.1209/epl/i2004-10446-4
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发表时间：
2005-03
期刊：
影响因子：
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通讯作者：
Xiangting Li;D. Bergman;D. Stroud
中科院分区：
文献类型：
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作者：
Xiangting Li;D. Bergman;D. Stroud
在收集的电介质球，悬浮在一个不同的电介质主机，并受到一个均匀的瞬时外电场，之间的力已被计算作为一个函数的各种参数的问题。一种新的方法是用来做这一点，这是基本上是准确的：没有假设是关于相邻领域的空间分离的小或两个相邻性的接近。特别地，球体可以是金属的，并且间隔可以比两个半径小得多。作为一个例子，两个球的情况进行了详细讨论。还讨论了在三个线性排列的金属球，其尺寸和间距连续减少，在自相似的方式在纳米透镜配置的最小的球上的力。实际上，该方法可以应用于在较大的球体集合中找到作用于任何球体的力，受到指向任意方向的外部场的影响。可能的应用包括电流变流体的模拟。
The force among a collection of dielectric spheres, suspended in a different dielectric host and subject to a uniform instantaneous external electric field, has been calculated as a function of the various parameters of the problem. A new approach is used to do this which is essentially exact: No assumptions are made regarding the smallness of spatial separation of neighboring spheres or the closeness of the two permittivities. In particular, the spheres can be metallic and the separation can be much smaller than the two radii. As an example, the case of two spheres is discussed in detail. Also discussed is the force acting on the smallest sphere in a nano-lens configuration of three linearly aligned metallic spheres whose sizes and separations diminish consecutively in a self-similar fashion. Actually, the approach can be applied to find the force acting on any sphere in larger collections of spheres, subject to an external field which points in an arbitrary direction. Possible applications include simulations of electrorheological fluids.