The influence of compliant boundary proximity on the fundamental and subharmonic emissions from individual microbubbles.
| Autor: | Helfield BL; Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada brandonhelfield@gmail.com, bleung@sri.utoronto.ca, goertz@sri.utoronto.ca., Leung BY; Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada brandonhelfield@gmail.com, bleung@sri.utoronto.ca, goertz@sri.utoronto.ca., Goertz DE; Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada brandonhelfield@gmail.com, bleung@sri.utoronto.ca, goertz@sri.utoronto.ca. |
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| Jazyk: | angličtina |
| Zdroj: | The Journal of the Acoustical Society of America [J Acoust Soc Am] 2014 Jul; Vol. 136 (1), pp. EL40-6. |
| DOI: | 10.1121/1.4885544 |
| Abstrakt: | The proximity of a solid-liquid boundary has been theoretically predicted to affect nonlinear microbubble emissions, but to date there has been no experimental validation of this effect. In this study, individual microbubbles (n = 15) were insonicated at f = 11 MHz as a function of offset distance from a compliant (agarose) planar boundary by employing an optical trapping apparatus. It was found that fundamental scattering increases while subharmonic scattering decreases as the microbubble approaches the boundary. Although a microbubble-boundary model can predict the qualitative trends observed for a subset of encapsulation properties, further modeling efforts are required to completely model compliant boundary-microbubble interactions. |
| Databáze: | MEDLINE |
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