Nanobubbles or Nanodroplets and are these Objects Cavitation Nuclei?

Tag / Zeit: 18.08.2021, 10:20-10:40
Raum: Strauss 1
Typ: Regulärer Vortrag
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Although the existence of nanobubbles and surface attached nanobubbles is still a subject of debate, there are common methods and numerous studies for the generation of surface attached nanobubbles. A common generation method is mixing of ethanol and water to create a gas supersaturation.Oily contaminations from a wide variety of sources can easily be mistaken for the actual desired bubbles. Different tools like an optical tweezer, laser-generated bubbles, lipophilic fluorescent dye and local heating by laser are used to distinguish between drops and bubbles in a micofluidic setup with optical high-speed observations at the resolution limit.