Acoustics Research Letters Online
Measurements were undertaken to determine the unknown microbubble-size distribution of a dodecafluoropentane (DDFP) emulsion consisting of in surfactant-stabilized water. The acoustic backscatter of 2-microsecond-duration tonebursts of 30-MHz focused ultrasound was measured from the emulsion as it moved in a coaxial flow. Calibration for the system was accomplished using 3-μm-radius polystyrene spheres, using a linear scattering model and literature values for polystyrene. Applying viscous linear scattering theory to the backscatter data from individual DDFP bubbles allowed inversion of the radius–backscatter relation. A mean microbubble radius of 130 nm was inferred for the DDFP population. © 2005 Acoustical Society of America.
E. Carr Everbach, D. B. Khismatullin, J. T. Flaherty, and R. A. Roy.
"Characterization Of Individual Submicron Perfluorocarbon Gas Bubbles By Ultrasonic Backscatter".
Acoustics Research Letters Online.