Surface bubble nucleation phase space

Details Surface bubble nucleation phase space Surface bubble nucleation phase space

2010-10-26

arxiv.org/abs/1011.1786v1

Phys. Rev. Lett. 106, 056101 (2011)

Physics

Fluid Dynamics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.106.056101

Recent research has revealed several different techniques for nanoscopic gas nucleation on submerged surfaces, with findings seemingly in contradiction with each other. In response to this, we have systematically investigated the occurrence of surface nanobubbles on a hydrophobised silicon substrate for various different liquid temperatures and gas concentrations, which we controlled independently. We found that nanobubbles occupy a distinct region of this phase space, occurring for gas concentrations of approximately 100-110%. Below the nanobubble phase we did not detect any gaseous formations on the substrate, whereas micropancakes (micron wide, nanometer high gaseous domains) were found at higher temperatures and gas concentrations. We moreover find that supersaturation of dissolved gases is not a requirement for nucleation of bubbles.

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