Pulsed laser triggered high speed microfluidic switch

Ting-Hsiang Wu, L. Gao, Yue Chen, Kenneth Wei, P. Chiou
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引用次数: 43

Abstract

We report a high speed microfluidic switch capable of achieving a switching time of 70 musec. The switching mechanism is realized by exciting dynamic vapor bubbles with focused laser pulses in a microfluidic PDMS channel. A time-resolved imaging system has been constructed to capture the nanosecond transient channel wall deformation and the particle flow pattern. A switching of polystyrene microspheres in a Y channel has also been demonstrated. This ultrafast laser triggered switching mechanism has the potential to advance the sorting speed of the state-of-the-art microscale fluorescent activated cell sorting devices for two orders of magnitude.
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脉冲激光触发高速微流控开关
我们报告了一种高速微流体开关,能够实现70毫秒的开关时间。该开关机制是通过聚焦激光脉冲在微流控PDMS通道中激发动态汽泡来实现的。建立了一种时间分辨成像系统来捕捉纳秒瞬态通道壁变形和粒子流型。还证明了聚苯乙烯微球在Y通道中的开关。这种超快激光触发开关机制有可能将最先进的微尺度荧光激活细胞分选装置的分选速度提高两个数量级。
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