In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 148, No. 4_Supplement ( 2020-10-01), p. 2782-2782
Kurzfassung:
Acoustic tweezers based on the sound beam systems hold the promise of contactless manipulation of microparticles. However, in these conventional diffraction-limited system, acoustic diffraction severely limits the trapping strength and the minimum size of the trapped particles. Here, we theoretically propose and experimentally demonstrates that a simple cylindrical shell based acoustic tweezers can be utilized for trapping of sub-wavelength particles and cells with a radius as small as 1/400 of the corresponding acoustic wavelength. This mechanism is attributed to the significantly enhanced acoustic radiation force originating from the resonant excitation of low order circumferential mode intrinsically existing in the cylindrical shell, which is a highly localized field around its surfaces and breaking the diffraction limit. We further demonstrate that the manipulation ability of these tweezers is significantly stronger than that of traditional standing wave based acoustic tweezers, which can significantly reduce physiological damage to cells or other biological objects arising from the thermal effects. Thus, the cylindrical shells based acoustic tweezers are simple, disposable, low cost, biocompatible, and functional, with applications including 3-D bio-printing, cell culturing and tissue engineering.
Materialart:
Online-Ressource
ISSN:
0001-4966
,
1520-8524
Sprache:
Englisch
Verlag:
Acoustical Society of America (ASA)
Publikationsdatum:
2020
ZDB Id:
1461063-2
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