Precision manufacture of phase-change perfluorocarbon droplets using microfluidics

Area of Science:

• Biomedical Engineering
• Acoustic Medicine
• Materials Science

Background:

• Liquid perfluorocarbon droplets are explored for medical acoustics, including tissue occlusion, imaging, and therapeutics.
• Current production methods yield polydisperse droplet sizes, impacting acoustic activation uniformity.
• Uniform droplet size is crucial for consistent acoustic activation parameters.

Purpose of the Study:

• To develop a method for producing monodisperse liquid perfluorocarbon droplets.
• To assess the stability and acoustic properties of these uniform droplets.
• To demonstrate the utility of microfluidic technology for controlled perfluorocarbon droplet manufacturing.

Main Methods:

• Utilized a microfluidic device employing flow-focusing technology to generate perfluoropentane droplets.
• Conducted stability studies to determine droplet shelf-life.
• Performed acoustic studies to characterize vaporization thresholds relative to droplet diameter.

Main Results:

• Successfully produced perfluoropentane droplets with a uniform size distribution.
• Demonstrated droplet stability for at least two weeks in storage.
• Observed a logarithmic relationship between acoustic pressure and vaporization threshold, with uniform droplets exhibiting minimal variability.

Conclusions:

• Microfluidic technology enables precise manufacturing control of phase-change perfluorocarbons.
• Uniform droplet populations enhance predictability in acoustic droplet vaporization applications.
• This advancement supports the development of more consistent and effective acoustic medical devices.