[16p-A502-1~14] 3.7 Optical measurement, instrumentation, and sensor (formerly 3.8)

[16p-A502-5] Acoustic cavitation by 100-megahertz-range high-intensity ultrasound irradiation

〇(DC)Yuki Harada¹, Mutsuo Ishikawa², Mami Matsukawa¹, Daisuke Koyama¹ (1.Doshisha Univ., 2.Toin Univ. of Yokohama)

Keywords:optical measurement, acoustic cavitation

Acoustic cavitation is a phenomenon in which bubbles are generated in a liquid when high-intensity ultrasound is irradiated into a liquid. The generation of acoustic cavitation is determined by the sound pressure (negative pressure) threshold of the ultrasound irradiation. As the ultrasound frequency increases, the sound pressure threshold for the generation of acoustic cavitation also increases. Therefore, there are few reports of acoustic cavitation in the high-frequency (several tens of MHz or more) range. In this report, we evaluated ultrafine bubbles generated by 100-megahertz-range high-intensity ultrasound irradiation.