Automatic separation of microscopic particles via optoelectronic chip and associated platform
Automatic separation of microscopic particles via optoelectronic chip and associated platform
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DOI：
10.1109/icma.2009.5246138
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发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
Xiaolu Zhu;Hong Yi;Z. Ni;Xingzhong Gu
中科院分区：
文献类型：
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作者：
Xiaolu Zhu;Hong Yi;Z. Ni;Xingzhong Gu
实验证明了一种利用光电微器件自动分离微小颗粒的有效方法。该技术是通过以该装置的激励信号的特定频率扫描光图案来实现的。这种无电极技术可以动态地重构电场分布，克服了传统微流控器件需要昂贵且刚性的微电极或微通道的缺点。通过实验和模拟，讨论了信号电压和微光线宽度对花粉粒子速度的影响。结果表明，不同性质花粉分离的最佳频率范围为500 kHz ~ 1 MHz，增大交流信号电压和光源线宽可提高花粉颗粒的饱和速度。在保证分离精度的前提下，增加光线宽优于增加电压。
An effective technique for automatic separation of microscopic particles through an optoelectronic micro device is experimentally demonstrated. This technique is realized through the scanning of light patterns at a certain frequency of the actuating signal for this device. This electrodeless technique can dynamically reconstruct the distribution of electric field, which overcomes the drawback that conventional microfluidic devices need costly and rigid microelectrodes or microchannels. The influences of the signal voltage and the width of the micro light line on the pollen particle velocity are discussed through experiments and simulations. The conclusion is drawn that the optimal frequencies for the separation of pollen grains with different properties range from 500 kHz to 1 MHz, and increasing the ac signal voltage and the light line width are able to increase the saturating velocity of pollen particles. Furthermore, increasing light linewidth is better than increasing the voltage under the precondition that separation accuracy is guaranteed.