On the rigidity of four hundred Pickering-stabilised microbubbles
Résumé
This study explores the rigidity of Pickering-stabilised microbubbles subjected to low-amplitude ultrasound. Such microbubbles might be suitable ultrasound contrast agents. Using an adapted Rayleigh-Plesset equation, we modelled the dynamics of microbubbles with a 7.6-N m$^{-1}$ shell stiffness under 1-MHz, 0.2-MPa sonication. Such dynamics were observed experimentally, too, using high-speed photography. The maximum expansions were agreeing with those predicted for Pickering-stabilised microbubbles. Subjecting microbubbles to multiple time-delayed pulses yielded the same result. We conclude that Pickering-stabilised microbubbles remain very stable at low acoustic amplitudes.
Domaines
Acoustique [physics.class-ph]
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Anderton+et+al_2022_Jpn._J._Appl._Phys._10.35848_1347-4065_ac4adc.pdf (383.97 Ko)
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