An ultrasonic atomization has been used for various things such as a humidifier and so on. An ultrasonic atomizer with a piezoelectric element generates the ultrasound. If you put the ultrasonic atomizer in liquid, the liquid surface uplift occurred along the water column by the vibrational energy, the atomization phenomenon is observed at the tip. In this study, we atomized aqueous surfactant solutions using the ultrasonic atomizer, measured the particle size of water atomized. As a result, the particle size of aqueous surfactant solutions was larger than that of distilled water. Further the particle size of aqueous surfactant solutions adding the salt was larger than that of aqueous surfactant solutions. From these result the particle size was found likely to rely on the coastal micelle concentration.
