47 citations · 117 across the 11 of their papers we have counts for
11 papers
Controlled tempering of lipid concentration and microbubble shrinkage as a possible mechanism for fine-tuning microbubble size and shell properties
Intesar O. Zalloum, Amin Jafari Sojahrood, Ali A. Paknahad +3
The acoustic response of microbubbles (MBs) depends on their resonance frequency, which is dependent on MB size and shell properties. Monodisperse MBs with tunable shell properties…
Shell elasticity and viscosity of lipid-coated microbubbles are significantly altered in mediums of different ionic strength
Amin Jafari Sojahrood, Celina Yang, Claire Counil +4
Correct measurement of the shell properties of coated microbubbles (MBs) is essential to understanding and optimizing their response to ultrasound (US) exposure parameters in diagn…
Experimental and numerical evidence of intensified non-linearity at the micro and nano scale: The lipid coated acoustic bubble
AJ Sojahrood, H. Haghi, T. M. Porter +2
A lipid coated bubble (LCB) oscillator is a very interesting non-smooth oscillator with many important applications ranging from industry and chemistry to medicine. However, due to…
On the threshold of 1/2 order subharmonic emissions in the oscillations of ultrasonically excited bubbles
A. J. Sojahrood, N. R. Shirazi, H. Haghi +2
The pressure threshold for 1/2 order subharmonic (SH) emissions and period doubling during the oscillations of ultrasonically excited bubbles is thought to be minimum when the bubb…
Classification of the mechanisms of wave energy dissipation in the nonlinear oscillations of coated and uncoated bubbles
A. J. Sojahrood, H. Haghi, N. R. Shirazi +2
Acoustic waves are dissipated when they pass through bubbly media. Dissipation by bubbles takes place through thermal damping (Td), radiation damping (Rd) and damping due to the fr…
Nonlinear dynamics of acoustic bubbles excited by their pressure dependent subharmonic resonance frequency: oversaturation and enhancement of the subharmonic signal
A. J. Sojahrood, R. Earl, Q. Li +3
The acoustic bubble is an example of a highly nonlinear system which is the building block of several applications and phenomena ranging from underwater acoustics to sonochemistry…
Notes on the two main routes of period doubling and 1/2 order subharmonic oscillations in a bubble oscillator
A. J. Sojahrood, R. E. Earl, M. C. Kolios +1
Period doubling route to chaos is one of the well-known characteristics of nonlinear oscillators. A bubble is a highly nonlinear oscillator that exists in various phenomena and app…
Fast Three-dimensional Opto-acoustic Simulation for Linear Array with Rectangular Elements
Jason Zalev, Michael C. Kolios
Simulation involves predicting responses of a physical system. In this article, we simulate opto-acoustic signals generated in a three-dimensional volume due to absorption of an op…
On the collective behavior of interacting polydisperse microbubbles
H. Haghi, AJ Sojahrood, M. C. Kolios
Exploiting the full potential of MBs for applications requires a good understanding of their complex dynamics. Improved understanding of MB oscillations can lead to further enhance…
Pressure dependence of the ultrasound attenuation and speed in bubbly media: Theory and experiment
A. J. Sojahrood, Q. Li, H. Haghi +3
Results of the measurements of sound speed and attenuation in a bubbly medium are reported. Monodisperse bubble solutions are sonicated with broadband ultrasound pulses with pressu…
A comprehensive bifurcation method to analyze the super-harmonic and ultra-harmonic behavior of the acoustically excited bubble oscillator
AJ. Sojahrood, D. Wegierak, H. Haghi +2
Acoustically excited bubbles are involved in a wide range of phenomena and applications ranging from oceanography to sonoluminescence; they have applications in chemistry, medical…