The forbidden band and size selectivity of acoustic radiation force trapping.

ABSTRACT: Acoustic micro-beams produced by highly focused ultrasound transducer have been investigated for micro-particle and cell manipulation. Here we report the selective trapping of microspheres via the acoustic force using the single acoustical beam. The forbidden band theory of acoustic radiation force trapping is proposed, which indicates that the trapping of particles via the acoustic beam is directly related to the particle diameter-to-beam wavelength ratio as well as excitation frequency of the ultrasonic acoustic tweezers. Three tightly focused LiNbO₃ transducers with different center frequencies were fabricated for use as selective single beam acoustic tweezers (SBATs). These SBATs were capable of selectively manipulating microspheres of sizes 5-45 μm by adjusting the waveleng

SUBMITTER: Li Z 

PROVIDER: S-EPMC7809519 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature