Characteristics of nanobubbles obtained with electrolysis of aqueous solution.

Abstract

The analysis of stability mechanism and structure of gas-interface of nanobubble are become to be important for applying nanobubbles to cleaning, nanoscale ultrasound contrast and drug delivery. The determination of nanobubble concentration was established, the control of nanobubble diameter were investigated with loading Ir₂O₃ nanoparticle on platinum surface and the weight of nanobubble was studied with centrifugation of electrolyzed solution. In the case of ionic strength above 0.10 mol dm^-3, the density of oxygen-nanobubble including gas-liquid interface layer which move together is higher than that of solution. The lifetime of hydrogen nanobubbles was about three hrs, while that of oxygen nanobubbles was above 60 days. The layer may be thought to be rigid like a wall which reduces the diffusion rate of hydrogen and oxygen molecules to bulk solution and stabilizes nanobubbles.