title: Generation and Stability of Bulk Nanobubbles.
abstract: Recently, extremely small bubbles, referred to as nanobubbles, have drawn increased attention due to their novel properties and great potential for various applications. In this study, a novel method for the generation of bulk nanobubbles (BNBs) was introduced, and stability of fabricated BNBs was investigated. BNBs were created from CO2gas with a mixing method; the chemical identity and phase state of these bubbles can be determined via infrared spectroscopy. The presence of BNBs was observed with a nanoparticle tracking analysis (NTA). The ATR-FTIR spectra of BNBs indicate that the BNBs were filled with CO2gas. Furthermore, the BNB concentration and its ζ-potential were about 2.94 × 108particles/mL and -20 mV, respectively (24 h after BNB generation with a mixing time of 120 min). This indicates the continued existence and stability of BNBs in water for an extended period of time.
authors.affiliation: School of Mechanical Engineering, Chung-Ang University , Seoul 156-756, Korea.
authors.forename: Seung Hoon
authors.initials: SH
authors.lastname: Oh
authors.affiliation: School of Mechanical Engineering, Chung-Ang University , Seoul 156-756, Korea.
authors.forename: Jong-Min
authors.identifier: 0000-0001-9206-0382
authors.initials: JM
authors.lastname: Kim