Changes in microbubble dynamics near a boundary revealed by combined optical micromanipulation and high-speed imaging

Garbin, V. and Cojoc, D. and Ferrari, Enrico and Di Fabrizio, E. and Overvelde, M. L. J. and van der Meer, S. M. and de Jong, N. and Lohse, D. and Versluis, M. (2007) Changes in microbubble dynamics near a boundary revealed by combined optical micromanipulation and high-speed imaging. Applied Physics Letters, 90 (11). p. 114103. ISSN 0003-6951

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Official URL: http://apl.aip.org/resource/1/applab/v90/i11/p1141...

Abstract

The authors report optical observations of the change in the dynamics of one and the same ultrasound contrast agent microbubble due to the influence of interfaces and neighboring bubbles. The bubble is excited by a 2.25 MHz ultrasound burst and its oscillations are recorded with an ultrahigh-speed camera at 15 million frames per second. The position of an individual bubble relative to a rigid wall or second bubble is precisely controlled using optical tweezers based on Laguerre-Gaussian laser beams [ P. Prentice et al., Opt. Express 12, 593 (2004) ; V. Garbin et al., Jpn. J. Appl. Phys. 44, 5773 (2005) ]. This allows for repeated experiments on the very same bubble and for a quantitative comparison of the effect of boundaries on bubble behavior.

Item Type:Article
Additional Information:The authors report optical observations of the change in the dynamics of one and the same ultrasound contrast agent microbubble due to the influence of interfaces and neighboring bubbles. The bubble is excited by a 2.25 MHz ultrasound burst and its oscillations are recorded with an ultrahigh-speed camera at 15 million frames per second. The position of an individual bubble relative to a rigid wall or second bubble is precisely controlled using optical tweezers based on Laguerre-Gaussian laser beams [ P. Prentice et al., Opt. Express 12, 593 (2004) ; V. Garbin et al., Jpn. J. Appl. Phys. 44, 5773 (2005) ]. This allows for repeated experiments on the very same bubble and for a quantitative comparison of the effect of boundaries on bubble behavior.
Keywords:bubbles, radiation pressure, laser beams, flow visualisation
Subjects:F Physical Sciences > F361 Laser Physics
F Physical Sciences > F310 Applied Physics
F Physical Sciences > F380 Acoustics
Divisions:College of Science > School of Life Sciences
ID Code:6984
Deposited By: Enrico Ferrari
Deposited On:28 Nov 2012 07:11
Last Modified:28 Nov 2012 07:11

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