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60-MHz lithium niobate single crystal single-element ultrasonic transducers with an f-number (ƒ#) of 0.6 were developed for acoustic microbeam applications. The ƒ# of the transducer is the smallest ever reported on the study of single beam acoustic tweezers. With tightly focused ultrasound microbeam, a single Zebrafish egg as large as ∼1.6 mm diameter was demonstrated to be manipulated two dimensionally...
Several 200-MHz lithium niobate (LN) single crystal single-element press-focused ultrasonic transducers were developed for biomedical applications. Micro-particle trapping experiments were carried out to demonstrate that the acoustic device can manipulate a single microbead as small as 5 µm within the range of hundreds of micrometers in distilled water. As the result suggests that the 200-MHz microbeam...
Optical tweezers, which have limited applications sometimes, have been employed in various fields. Acoustic trapping was suggested as an alternative tool. It was previously shown that a 30 MHz ultrasound microbeam device (acoustic tweezer) could trap a 120 μm lipid particle in water. In order to find more practical applications for this device, typically in cell mechanics, the trapped particle size...
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