Dielectrophoretic investigations of sub-micrometre latex spheres
Dielectrophoretic investigations of sub-micrometre latex spheres
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DOI：
10.1088/0022-3727/30/18/018
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发表时间：
1997-09-21
影响因子：
3.4
通讯作者：
Morgan, H
中科院分区：
文献类型：
--
作者：
Green, NG;Morgan, H
非均匀AC电场在可极化粒子中诱导运动，称为介电泳。负责这种运动的力由悬浮介质和颗粒的介电性质以及场的几何形状决定。利用微加工电极结构研究了亚微米乳胶球的介电电泳特性。在测量中使用的电极的电场的几何形状已经解决了使用数值分析。的球体的介电电泳性能的测量已在一个范围内的介质电导率和施加的场频率和强度。所观察到的行为和理论预期之间的比较。
A non-uniform AC electric field induces a motion in polarizable particles, called dielectrophoresis. The force responsible for this motion is governed by the dielectric properties both of the suspending medium and of the particles, as well as the geometry of the field. The dielectrophoretic properties of sub-micrometre latex spheres have been studied using micro-fabricated electrode structures. The electric field geometry for electrodes used in the measurements has been solved using numerical analysis. Measurements of the dielectrophoretic properties of the spheres have been made over a range of medium conductivities and applied field frequencies and strengths. Comparisons between the observed behaviour and that expected from theory are presented.