Evidence and Physics of Nanobubbles in Water

• Applicant: Professor Dr. Claus-Dieter Ohl
• Subject Area: Statistical Physics, Nonlinear Dynamics, Complex Systems, Soft and Fluid Matter, Biological Physics ; Fluid Mechanics
• Term: from 2019 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 410738969

• Final Report Year: 2023

Final Report Abstract

In this collaborative DFG project we wanted to understand the stabilization mechanism of bulk nanobubles. Our Chinese partner Prof. Sun from Tsinghua university focused on studying bulk nanobubbles as ensembles, while at OvGU we look at individual nanobubbles. Within this project we have developed models that explain the stability of nanobubbles, tested the effect of temperature and ion-concentration, developed novel techniques to generate nanobubbles on the substrate and in the bulk volume and have shared this knowledge with 10 publications, including 2 Physical Review Letter publications. Additionally, we have organized the international conference on ”Nanobubbles 2022” at OvGU and contributed with two review articles to dissemination of subject knowledge.

Publications

• How Bulk Nanobubbles Might Survive. Physical Review Letters, 124(13).
  Tan, Beng Hau; An, Hongjie & Ohl, Claus-Dieter
  
• The interplay among gas, liquid and solid interactions determines the stability of surface nanobubbles. Nanoscale, 12(44), 22698-22709.
  Tortora, Marco; Meloni, Simone; Tan, Beng Hau; Giacomello, Alberto; Ohl, Claus-Dieter & Casciola, Carlo Massimo
  
• How bulk nanobubbles are stable over a wide range of temperatures. Journal of Colloid and Interface Science, 596, 184-198.
  Li, Mingbo; Ma, Xiaotong; Eisener, Julian; Pfeiffer, Patricia; Ohl, Claus-Dieter & Sun, Chao
  
• Identifying surface-attached nanobubbles. Current Opinion in Colloid & Interface Science, 53, 101429.
  Tan, Beng Hau; An, Hongjie & Ohl, Claus-Dieter
  
• Nanobubbles or nanodroplets. u In Tagungsband - DAGA 2021, pages 543–546, Berlin, 2021. Deutsche Gesellschaft f¨r Akustik e.V. (DEGA)
  Julian Eisner; Kirill Kolmakov; Patricia Pfeiffer & Claus-Dieter Ohl
  
• On-Demand Bulk Nanobubble Generation through Pulsed Laser Illumination. Physical Review Letters, 127(4).
  Rosselló, Juan Manuel & Ohl, Claus-Dieter
  
• Stability of surface and bulk nanobubbles. Current Opinion in Colloid & Interface Science, 53, 101428.
  Tan, Beng Hau; An, Hongjie & Ohl, Claus-Dieter
  
• Strong shear flows release gaseous nuclei from surface micro-and nanobubbles. Physical Review Fluids, 6(4).
  Ren, Zibo; Liu, Shuhong; Tan, Beng Hau; Denner, Fabian; Evrard, Fabien; van Wachem, Berend; Zuo, Zhigang & Ohl, Claus-Dieter
  
• Transient Solubility Gradients Mediate Oversaturation during Solvent Exchange. Physical Review Letters, 126(23).
  Tan, Beng Hau; Ohl, Claus-Dieter & An, Hongjie
  
• Ion adsorption stabilizes bulk nanobubbles. Journal of Colloid and Interface Science, 606, 1380-1394.
  Ma, Xiaotong; Li, Mingbo; Pfeiffer, Patricia; Eisener, Julian; Ohl, Claus-Dieter & Sun, Chao
  
• Thermally Assisted Heterogeneous Cavitation through Gas Supersaturation. Physical Review Letters, 128(19).
  Pfeiffer, Patricia; Eisener, Julian; Reese, Hendrik; Li, Mingbo; Ma, Xiaotong; Sun, Chao & Ohl, Claus-Dieter