Measurement of microscopic spatial distribution of acoustic radiation force using microspheres and electrostatic force

研究成果: Article

2 引用 (Scopus)

抄録

A simple method for measuring the microscopic spatial distribution of the acoustic radiation force by exploiting the competition between the acoustical radiation force and the electrostatic force on charged microspheres is investigated. First, the effective charge of polystyrene spheres is measured by monitoring the mobility of the particles in the 1 Hz, 13.4 Vpp/mm alternating electric field. Next, the shift of the particles away from the sound pressure node with an increase in intensity of the electrostatic force is observed by optical microscopy, and finally the acoustic radiation force is estimated. In the experiment, the spatial distribution of the acoustic radiation force in the 500 kHz, 80 Vpp standing wave was proportional to the sine curve, and had the same tendency as the result obtained from calculation. The intensity was 0.5 pN for 7 μm polystyrene spheres.

元の言語English
ページ(範囲)3316-3319
ページ数4
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
38
発行部数5 B
出版物ステータスPublished - 1999
外部発表Yes

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Electrostatic force
Microspheres
sound waves
Spatial distribution
spatial distribution
Acoustics
electrostatics
Radiation
Polystyrenes
polystyrene
Optical microscopy
Electric fields
Acoustic waves
sound pressure
standing waves
Monitoring
tendencies
microscopy
electric fields
Experiments

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

これを引用

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abstract = "A simple method for measuring the microscopic spatial distribution of the acoustic radiation force by exploiting the competition between the acoustical radiation force and the electrostatic force on charged microspheres is investigated. First, the effective charge of polystyrene spheres is measured by monitoring the mobility of the particles in the 1 Hz, 13.4 Vpp/mm alternating electric field. Next, the shift of the particles away from the sound pressure node with an increase in intensity of the electrostatic force is observed by optical microscopy, and finally the acoustic radiation force is estimated. In the experiment, the spatial distribution of the acoustic radiation force in the 500 kHz, 80 Vpp standing wave was proportional to the sine curve, and had the same tendency as the result obtained from calculation. The intensity was 0.5 pN for 7 μm polystyrene spheres.",
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KW - Zeta potential

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