Acoustic mixing in a dome-shaped chamber-based SAW (DC-SAW) device.,Lab on a Chip

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Acoustic mixing in a dome-shaped chamber-based SAW (DC-SAW) device.
Lab on a Chip ( IF 6.1 ) Pub Date : 2019-11-08 , DOI: 10.1039/c9lc00820a
Hyunjung Lim ₁ , Seung Min Back ₁ , Hyuk Choi ₁ , Jeonghun Nam ₂

Affiliation

The use of an open droplet system for surface acoustic wave (SAW)-based applications has been limited by droplet instability at high input power. This study introduces a dome-shaped chamber-based SAW (DC-SAW) device for the first time, which can be fabricated simply using a single adhesive tape and a drop of ultraviolet-curable material without soft lithography processes. The dome-shaped chamber device with a contact angle of 68° enables the maximizing of the effect of SAW transmitted at a refraction angle of roughly 22°, negating the droplet instability. The DC-SAW device was applied to acoustic mixing to estimate its capability. Acoustic mixing of two different fluids (i.e., deionized water and fluorescent particle suspension) was demonstrated in the dome-shaped chamber device. Moreover, the effect of flow rate and applied voltage on mixing performance was estimated. With the decreasing flow rate and increasing applied voltage, mixing performance was enhanced. At an applied voltage of 20 V, mixing indices were higher than 0.9 at a total flow rate of 300 μl min⁻¹.

中文翻译：

在基于圆顶形腔室的声表面波（DC-SAW）设备中进行声波混合。

开放液滴系统在基于表面声波（SAW）的应用中的使用受到高输入功率下液滴不稳定性的限制。这项研究首次引入了基于圆顶形腔室的声表面波（DC-SAW）器件，该器件可以简单地使用单个胶带和一滴可紫外线固化的材料进行制造，而无需进行软光刻工艺。接触角为68°的圆顶形腔室装置可最大程度地提高SAW在大约22°的折射角下传输的效果，从而消除了液滴的不稳定性。DC-SAW设备已应用于声学混合以估计其功能。两种不同流体的声学混合（即（去离子水和荧光粉悬浮液）在圆顶形腔室装置中进行了演示。此外，估计了流速和施加电压对混合性能的影响。随着流速的降低和施加电压的增加，混合性能得到了增强。在20 V的施加电压下，总流量为300μlmin ^-1时，混合指数高于0.9 。

更新日期：2019-11-08

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