Laser Breakdown Acoustic Effect of Ultrafine Particle in Liquids and Its Application to Particle Counting
Laser Breakdown Acoustic Effect of Ultrafine Particle in Liquids and Its Application to Particle Counting
复制标题
液体中超细颗粒的激光击穿声效应及其在颗粒计数中的应用
DOI：
10.1143/jjap.27.l983
复制
发表时间：
1988
影响因子：
1.5
通讯作者：
Y. Gohshi
中科院分区：
文献类型：
--
作者：
T. Kitamori;K. Yokose;Kazumichi Suzuki;T. Sawada;Y. Gohshi
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 ×1010 W/cm2, 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.
