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Thread-piezoelectric-substrate Based Low-cost Microfluidic Device

机译：基于线程-压电衬底的低成本微流控器件

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摘要

A new low cost microfluidic device has been designed and fabricated. Three thread microchannels were fabricated using tape and three indicting filter papers were also made by dipping three filter papers into sodium nitrite with different concentration. The side of the thread microchannels was connected to the indicting filter papers and then mounted on a 128° yxLiNbO3 piezoelectric substrate, on which an interdigital transducer and reflector were fabricated using microeletric technology. PDMS film was coated to avoid the evaporation of microfluid transporting in the thread based microchannels. When a 25.5MHz RF signal with 25.4dBm power was applied on the IDT, the microfluid on the piezoelectric substrate was actuated by surface acoustic wave and transported along the thread microchannels, and reacted with nitrite ion in the indicting filter paper. Experimental results show that the thread-piezoelectric substrate microfluidic device can be used for biological or chemical analysis.
机译：已经设计和制造了一种新型的低成本微流体装置。用胶带制成三个螺纹微通道，并通过将三张滤纸浸入不同浓度的亚硝酸钠中制成三张指示滤纸。螺纹微通道的侧面连接到指示滤纸，然后安装在128°yxLiNbO3压电基板上，在基板上使用微电技术制造了叉指式换能器和反射器。涂覆PDMS膜以避免在基于螺纹的微通道中微流体运输的蒸发。当在IDT上施加25.5dBm功率的25.5MHz RF信号时，压电基片上的微流体被表面声波驱动并沿着线状微通道传输，并与指示滤纸中的亚硝酸根离子反应。实验结果表明，该线型压电基板微流控装置可用于生物或化学分析。

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