School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710129, P. R. China.
School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, 710129, P. R. China.
Adv Sci (Weinh). 2023 Jul;10(19):e2300049. doi: 10.1002/advs.202300049. Epub 2023 Mar 26.
Bubbles in air are ephemeral because of gravity-induced drainage and liquid evaporation, which severely limits their applications, especially as intriguing bio/chemical reactors. In this work, a new approach using acoustic levitation combined with controlled liquid compensation to stabilize bubbles is proposed. Due to the suppression of drainage by sound field and prevention of capillary waves by liquid compensation, the bubbles can remain stable and intact permanently. It has been found that the acoustically levitated bubble shows a significantly enhanced particle adsorption ability because of the oscillation of the bubble and the presence of internal acoustic streaming. The results shed light on the development of novel air-purification techniques without consuming any solid filters.
由于重力引起的排液和液体蒸发，空气中的气泡是短暂的，这严重限制了它们的应用，特别是作为有趣的生物/化学反应器。在这项工作中，提出了一种使用声悬浮结合受控液体补偿来稳定气泡的新方法。由于声场抑制排液和液体补偿防止毛细波，气泡可以永久稳定和完整。研究发现，由于气泡的振荡和内部声流的存在，声悬浮气泡表现出显著增强的颗粒吸附能力。这些结果为开发新型空气净化技术提供了思路，无需消耗任何固体过滤器。
