An ultrasonic scattering technique for microparticle characterization
作者:
Ronald A. Roy,
Robert E. Apfel,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1985)
卷期:
Volume 77,
issue S1
页码: 21-21
ISSN:0001-4966
年代: 1985
DOI:10.1121/1.2022228
出版商: Acoustical Society of America
数据来源: AIP
摘要:
A modified technique is presented for determining the physical properties of individual microparticles such as biological cells. Two submerged confocally positioned transducers (one transmitter/receiver and one receiver) generate 30‐MHz center frequency tone bursts which scatter off of single particles convected by a coaxial jet flow. The scattered pressure is measured at 90° and 180°, analog envelope detected, digitized, and stored in computer memory. By employing a long wavelength acoustic scattering theory first developed by Raleigh, it is possible to calculate the particle density and compressibility givena prioriknowledge of both the particle volume and the physical properties of the host liquid. This apparatus, which is still in the developmental stage, is simpler and more versatile than an earlier, three‐transducer system developed by Mark Roos [Doctoral dissertation, Yale University (1983)]. The system performance and theoretical scattering model are evaluated using calibration particles (e.g., polystyrene spheres, liquid drops) and biological cells. [Work supported by NIH through grant number R01‐GM30419 and by ONR.]
点击下载:
PDF
(200KB)
返 回