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Surface acoustic wave (SAW) induced patterning of micro beads in microfluidic channels

机译:表面声波(SAW)在微流体通道中诱导微珠的图案化

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摘要

Micro beads were patterned in microfluidic channels by using standing surface acoustic waves (SSAW). The SSAW were formed through two parallel interdigital transducers (IDTs) on a LiNbO3 substrate. A PDMS microchannel was aligned with the IDTs and bonded with the substrate. A solution of fluorescent polystyrene beads (diameter: 1.9 μm) was injected into the channel through a pressure driven flow. When a 25 dBm AC signal (frequency: 23.9 MHz) was applied to the IDTs, the beads were patterned into two straight lines (∼5 μm in width) along the pressure nodes inside the channel.
机译:通过使用静置表面声波(SSAW),在微流体通道中图案化微珠。通过在Linbo 3-IM>衬底上通过两个平行的叉指传感器(IDTS)形成SSAW。 PDMS微通道与IDTS对齐并与基材粘合。通过压力驱动的流动将荧光聚苯乙烯珠粒(直径:1.9μm)的溶液注入通道中。当将25 dBm AC信号(频率:23.9MHz)施加到IDT时,沿沟道内的压力节点将珠子图案化为两条直线(宽度宽度)。

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