Microbubble formation from plasma polymers.
Anaram Shahravan1, Srinath Yelamarty, Themis Matsoukas
1Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
The Journal of Physical Chemistry. B
|September 8, 2012
Summary
Researchers observed liquid-like particles in toluene plasma that solidify into hydrogen-releasing microbubbles. These unique, stimuli-responsive microbubbles have potential applications in advanced materials.
Area of Science:
- Materials Science
- Plasma Physics
- Nanotechnology
Background:
- Glow discharge in toluene can produce unique particles.
- Understanding particle formation and transformation is crucial for material applications.
Purpose of the Study:
- To document the formation and solidification process of liquid-like particles in toluene plasma.
- To investigate the stimuli-responsive nature of the resulting microbubbles.
Main Methods:
- Utilizing glow discharge in toluene under specific conditions (low power, high pressure).
- Observing particle transformation using Transmission Electron Microscopy (TEM).
- Investigating stimuli-induced changes via electron beam, laser, and heating.
Main Results:
- Formation of liquid-like particles that solidify into microbubbles upon hydrogen release.
- Microbubbles exhibit micrometer-size diameter, nanometer-thick shells, and high volume fractions (>90%).
- Particles transform under electron beam, laser irradiation, and heating, indicating stimuli-responsiveness.
Conclusions:
- The study demonstrates a novel mechanism for forming stimuli-responsive microbubbles via particle solidification and hydrogen release.
- These microbubbles show potential for applications in thermal insulators, lightweight materials, and light scattering agents.