Effect of Focused Ultrasound on Residual Particle Size Distribution in Water

Abstract

The residual particle distribution in pure water could be a problem in the nanoscience fields because nanoparticles are usually suspended in pure water such as deionized or distilled water. The effect of ultrasound on the residual particle distribution in pure water should be analyzed because the nano particles used in nanoscience are usually dispersed using ultrasound power. In this study, using a cylindrical piezoelectric vibrator, a noncontact-type focusing ultrasound system was fabricated to keep the purity of the water. The residual particle distribution in pure water was investigated. The number of residual particles increased as the ultrasound exposure time increased.

Highly Sensitive Detection of Red Blood Cell Aggregation with Ultrasonic Peak Frequency

“…Research has been conducted to measure the particle distribution in various media. [11][12][13][14][15] On the basis of the finding that blood viscosity highly correlates to a certain degree with the RBC aggregation phenomenon mentioned above and that aggregate size is reflected in an ultrasonic scattering spectrum, several trials have been conducted on the ultrasonic estimation of the diameter of aggregates. [16][17][18][19][20][21][22][23] The reflection coefficient between RBCs and the serum is very small because both of them have similar acoustic impedances.…”