Acoustic levitation and manipulation by a high-frequency focused ring ultrasonic transducer

Chen, X., Lam, K. H. , Chen, R., Chen, Z., Qian, X., Zhang, J., Yu, P. and Zhou, Q. (2019) Acoustic levitation and manipulation by a high-frequency focused ring ultrasonic transducer. Applied Physics Letters, 114(5), 054103. (doi: 10.1063/1.5066615)

Abstract

Recently, acoustic levitation for non-contact micro-particle manipulation has been attracting great interest in physical, biological, and medical applications. Among the state-of-the-art manipulation technologies, single beam acoustic tweezing exhibits advantages of providing stronger trapping force and deeper penetration depth in tissues, inducing less tissue damage, and a simple configuration involving only one device. However, particle trapping by the single beam acoustic tweezer could only be operated on a smooth two-dimensional substrate, which limits the potential for real applications. Here, we report an initial attempt to acoustically levitate an individual micro-particle stably in water and manipulate the levitated micro-particle arbitrarily two-dimensionally by simply employing a 60-MHz focused ring ultrasonic transducer. The proposed working mechanism agrees well with the phenomenon. This approach could not only acoustically levitate and manipulate a micro-particle on a culture dish and on a mylar film, but could also work properly in levitating and manipulating a micro-particle placed inside the polyimide tube. This simple and low-cost approach is extremely useful for effective non-contact micro-particle manipulation without having critical concerns on the substrate properties.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lam, Dr Koko
• Authors: Chen, X., Lam, K. H., Chen, R., Chen, Z., Qian, X., Zhang, J., Yu, P., and Zhou, Q.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Applied Physics Letters
• Publisher: American Institute of Physics
• ISSN: 0003-6951
• ISSN (Online): 1077-3118

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