Laser Breakdown Acoustic Effect of Ultrafine Particle in Liquids and Its Application to Particle Counting : Mechanical and Acoustical Properties
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概要
- 論文の詳細を見る
The mechanism of acoustic signal generation from an ultrafine particle in liquids by laser irradiation was found to shift from the photoacoustic effect to optical breakdown of the particle as the power density of the excitation beam increased. The acoustic signal generated from a 0.085 μm polystyrene ultrafine particle in water increased discontinuously at the beam power density of 7.0×10^<10> W/cm^2, corresponding to its dielectric breakdown threshold. Then, a novel method in which ultrafine particles were counted individually by counting the breakdown acoustic pulses was proposed, and its counting principle was verified using the polystyrene ultrafine particles.
- 社団法人応用物理学会の論文
- 1988-06-20
著者
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Kitamori Takehiko
Energy Research Laboratory Hitachi Ltd.
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Sawada Tsuguo
Department F Industrial Chemistry Faculty Of Engineering The University Of Tokyo
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Gohshi Yohichi
Department Of Applied Chemistry School Of Engineering The University Of Tokyo
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YOKOSE Kenji
Energy Research Laboratoty, Hitachi, Ltd.
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Suzuki Kazumichi
Energy Research Laboratory Hitachi Ltd.
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Yokose Kenji
Energy Research Laboratory Hitachi Ltd.
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Gohshi Yohichi
Department Of Applied Chemistry Faculty Of Engineering The University Of Tokyo
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