Formation and stability of ultrasonic generated bulk nanobubbles

• 来源期刊: 中国物理B（英文版）
• 关键词: bulk nanobubble ultrasonic nanoparticle tracking analysis dissolved oxygen
• 年，卷（期）: 2018,（11）
• 页码范围: 377-381
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/11/118104

摘要

Although various and unique properties of bulk nanobubbles have drawn researchers' attention over the last few years,their formation and stabilization mechanism has remained unsolved.In this paper,we use ultrasonic methods to produce bulk nanobubbles in the pure water and give a comprehensive study on the bulk nanobubbles properties and generation.The ultrasonic wave gives rise to constant oscillation in water where positive and negative pressure appears alternately.With the induced cavitation and presence of dissolved air,the bulk nanobubbles formed."Nanosight" (which is a special instrument that combines dynamic light scattering with nanoparticle tracking analysis) was used to analyze the track and concentration of nanobubbles.Our results show that in our experiment,sufficient bulk nanobubbles were generated and we have proven they are not contaminations.We also found nanobubbles in the ultrasonic water change in both size and concentration with ultrasonic time.