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Theses/Dissertations

Mechanical Engineering Graduate Theses & Dissertations

Cavitation

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Full-Text Articles in Biomedical Engineering and Bioengineering

Ultrasound Assisted Cavitation Around Pulsed Laser Illuminated Nanoparticles, Hengyi Ju Jan 2013

Ultrasound Assisted Cavitation Around Pulsed Laser Illuminated Nanoparticles, Hengyi Ju

Mechanical Engineering Graduate Theses & Dissertations

The laser generation of vapor bubbles around plasmonic nanoparticles can be enhanced through the application of an ultrasound field; a technique referred to as photoacoustic cavitation. The combination of light and sound allows for bubble formation at lower laser fluence and peak negative ultrasound pressure than can be achieved using either modality alone. The growth and collapse of these bubbles leads to local mechanical disruption and acoustic emission, and can potentially be used to induce and monitor tissue therapy. The objective of this thesis is to understand the physics of nanoparticle-mediated photoacoustic cavitation, develop approaches to minimize the cavitation threshold ...