Size based separation of microparticles using a dielectrophoretic activated system
Size based separation of microparticles using a dielectrophoretic activated system
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DOI：
10.1063/1.3457226
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发表时间：
2010-08-01
影响因子：
3.2
通讯作者：
Kalantar-Zadeh, Kourosh
中科院分区：
文献类型：
--
作者：
Khoshmanesh, Khashayar;Zhang, Chen;Kalantar-Zadeh, Kourosh
这项工作描述了使用介电泳 (DEP) 系统根据悬浮在去离子 (DI) 水中的聚苯乙烯微粒的尺寸进行分离。 DEP 系统利用集成到微流体系统中的弯曲微电极。将 1、6 和 15 μm 的微粒应用于系统，并在 100、200 和 20 MHz 的不同频率下研究它们对 DEP 场的响应。微电极充当 15 μm 粒子的 DEP 屏障，并在所有频率下保留它们，而 1 和 6 μm 粒子的响应很大程度上取决于所施加的频率。在 100 kHz 时，两种粒子都被微电极捕获。然而，在 200 kHz 时，1 μm 颗粒被微电极捕获，而 6 μm 颗粒则被推向侧壁。最后，在 20 MHz 的频率下，两个粒子都被推向侧壁。实验显示了系统在微流体系统中对不同尺寸的微粒进行分类的可调性能。 (C) 2010 年美国物理研究所。 [号码：10.1063/1.3457226]
This work describes the separation of polystyrene microparticles suspended in deionized (DI) water according to their dimensions using a dielectrophoretic (DEP) system. The DEP system utilizes curved microelectrodes integrated into a microfluidic system. Microparticles of 1, 6, and 15 mu m are applied to the system and their response to the DEP field is studied at different frequencies of 100, 200, and 20 MHz. The microelectrodes act as a DEP barrier for 15 mu m particles and retain them at all frequencies whereas the response of 1 and 6 mu m particles depend strongly on the applied frequency. At 100 kHz, both particles are trapped by the microelectrodes. However, at 200 kHz, the 1 mu m particles are trapped by the microelectrodes while the 6 mu m particles are pushed toward the sidewalls. Finally, at 20 MHz, both particles are pushed toward the sidewalls. The experiments show the tunable performance of the system to sort the microparticles of various dimensions in microfluidic systems. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3457226]