Recent developments in nanobubble research based onsynchrotron radiation techniques
Abstract
<p indent="0mm">Nanobubbles are submicron gaseous domains dispersed in solutions or absorbed on solid-liquid interfaces. According to the predictions made on the basis of Young-Laplace equation and diffusion theory, such small bubbles should disappear within microseconds. However, over the past <sc>20 years,</sc> many experimental results have demonstrated that the nanobubbles can survive and remain stable for hours. These nanobubbles, just as “the small puzzling dark clouds”, remain a big challenge to the fundamental researches. Nanobubble-based technologies are considered a revolutionary innovation in various fields, including environmental remediation, wastewater treatment, mineral flotation, agriculture, and aquaculture, etc. As a powerful tool to probe the micro/nanostructures and electron structures of the tested samples, synchrotron radiation techniques offer a possibility of revealing the mysterious superstability of nanobubbles and the mechanism of their effects. This paper reviewed the principles of the synchrotron radiation techniques applied for detecting nanobubbles and focused on the recent advances. The perspectives and trends in synchrotron radiation techniques in the future studies of nanobubbles were also presented.</p>
