Trapping force on a finite-sized particle in a dielectrophoretic cage
Trapping force on a finite-sized particle in a dielectrophoretic cage
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DOI：
10.1103/physreve.72.016602
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发表时间：
2005-07-01
影响因子：
2.4
通讯作者：
Aubry, N
中科院分区：
文献类型：
--
作者：
Singh, P;Aubry, N
点偶极（PD）模型通常用于估计介电泳（DEP）力的粒子放置在介电泳设备，如方形笼子的不均匀电场。我们表明，如果颗粒尺寸远小于介电泳笼的大小，PD模型准确地近似实际的DEP力，数值计算使用麦克斯韦应力张量方法。然而，当两种尺寸相当时，实际DEP力在幅度和方向上与PD模型给出的力显著不同。
The point dipole (PD) model is routinely used for estimating the dielectrophoretic (DEP) force acting on a particle placed in the nonuniform electric fields of dielectrophoresis devices, such as square cages. We show that if the particle size is much smaller than the dielectrophoretic cage size, the PD model accurately approximates the actual DEP force, computed numerically using the Maxwell stress tensor method. However, when the two sizes are comparable, the actual DEP force differs significantly in both magnitude and direction from that given by the PD model.