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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >The breakup of digital microfluids on a piezoelectric substrate using surface acoustic waves
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The breakup of digital microfluids on a piezoelectric substrate using surface acoustic waves

机译：使用表面声波在压电基板上分解数字微流体

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摘要

A new method for the breakup of a digital microfluid (a discrete droplet) is presented and a device for splitting the digital microfluid is fabricated on a 128° yx-LiNbO3 piezoelectric substrate using microelectronic technology. Together with the surface tension of the digital microfluid, the inertia of acoustic streaming caused by the sudden disappearance of the electric signal for generating the surface acoustic wave breaks up the digital microfluid. The escape angle of the daughter digital microfluids is calculated. A sound-absorption film is coated on the acoustic path to prevent the further breakup of the daughter digital microfluids. Droplet breakups are demonstrated using red dye solution digital microfluids. Results show that digital microfluids can be broken up by suddenly decreasing the power of the electrical signal from 12.3 dBm to -3.98 dBm, and the average escape angle of daughter digital microfluids is 68.5° for 4 μL of initial digital microfluid. The results also show that the escape angle is affected by the initial volume of the digital microfluid.
机译：提出了一种分解数字微流体（离散液滴）的新方法，并使用微电子技术在128°yx-LiNbO3压电基板上制造了一种将数字微流体分裂的装置。连同数字微流体的表面张力，由用于产生表面声波的电信号的突然消失引起的声流惯性破坏了数字微流体。计算子数字微流体的逸出角。吸声膜被涂覆在声路上，以防止子数字微流体的进一步破裂。使用红色染料溶液数字微流体可以证明液滴破裂。结果表明，可以通过将电信号的功率突然从12.3 dBm降低到-3.98 dBm来分解数字微流体，并且对于4μL初始数字微流体，子数字微流体的平均逸出角为68.5°。结果还表明，逸出角受数字微流体初始体积的影响。

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