Acoustically Active Antibubbles
S. Kotopoulisa,b, K. Johansen b, O.H. Giljaa,c, A.T. Poortinga d and M. Postemab,e
aNational Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Jonas Lies vei 65, 5021 Bergen, Norway
bDepartment of Physics and Technology, University of Bergen, All├ęgaten 55, 5007 Bergen, Norway
cDepartment of Clinical Medicine, University of Bergen, Jonas Lies vei 65, 5021 Bergen, Norway
dDepartment of Mechanical Engineering, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
eThe Michelsen Centre for Industrial Measurement Science and Technology, Fantoftvegen 38, 5892 Bergen, Norway
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In this study, we analyse the behaviour of antibubbles when subjected to an ultrasonic pulse. Specifically, we derive oscillating behaviour of acoustic antibubbles with a negligible outer shell, resulting in a Rayleigh-Plesset equation of antibubble dynamics. Furthermore, we compare theoretical behaviour of antibubbles to behaviour of regular gas bubbles. We conclude that antibubbles and regular bubbles respond to an acoustic wave in a very similar manner if the antibubble's liquid core radius is less than half the antibubble radius. For larger cores, antibubbles demonstrate highly harmonic behaviour, which would make them suitable vehicles in ultrasonic imaging and ultrasound-guided drug delivery.

DOI: 10.12693/APhysPolA.127.99
PACS numbers: 47.55.dd, 43.25.Yw, 43.80.Sh