Nucleating cavitation from laser-illuminated nano-particles

被引：75

作者：

Farny, CH ^{[1
]}

Wu, TM ^{[1
]}

Holt, RG ^{[1
]}

Murray, TW ^{[1
]}

Roy, RA ^{[1
]}

机构：

[1] Boston Univ, Dept Aerosp & Mech Engn, Boston, MA 02215 USA

来源：

ACOUSTICS RESEARCH LETTERS ONLINE-ARLO | 2005年 / 6卷 / 03期

关键词：

D O I：

10.1121/1.1897823

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Vapor bubble generation from laser-illuminated gold nano-particles has been investigated as a means of providing nucleation sites for cavitation induced by high-intensity focused ultrasound (HIFU). Pulses from a 532-nm Nd:Yag laser were synchronized with a pulsed 1.1-MHz HIFU source in an acrylamide phantom seeded with 82-nm-diameter gold particles. Emissions from bubble collapses were detected by a 15-MHz focused transducer at a laser pulse energy and HIFU focal pressure of 0.10 mJ and 0.92 MPa, respectively. In comparison, a HIFU peak focal pressure of 4.50 MPa was required to nucleate detectable cavitation without laser illumination. (C) 2005 Acoustical Society of America.

引用

页码：138 / 143

页数：6

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