Design and Build an Acoustic Tweezers and Move up the Polystyrene Particles

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Ghavidel, Amir | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 50064 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Amjadi, Ahmad
Abstract:
Ultrasound waves have attracted substantial attention due to their potential for trapping the small particles, which cannot be handled by usual tweezers. The acoustic tweezer is a technology that is able to tarp and control the movement of micrometer to millimeter objects by standing or focused sound waves. Acoustic tweezers are the subject of many researches around the world, due to simplicity, cost-effective, biocompatibility and most important better performance in non-transparent optical environments, compared with optical tweezers.In this project, by using a ring piezoelectric and a power amplifier, an acoustic tweezer was designed and constructed. Moreover, the polystyrene particles was trapped in water. It was shown that the sound waves from a flat piezoelectric is reflected in interface between the water and air so the standing wave was generated and the particles be trapped in nodes. The movement of particles was performed by changing the phase and frequency of sound wave.Furthermore, the conglutination of particles and disarticulate of them when the radius of reaches a specific value was reported
Keywords:
Acoustic Tweezer ; Ultrasonic Waves ; Trapping ; Piezoelectricity ; Ultrasonic Power Amplifier

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