期刊
PHYSICAL REVIEW LETTERS
卷 127, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.044502
关键词
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资金
- Alexander von Humboldt Foundation (Germany) through the Georg Forster Research Fellowship
- National Natural Science Foundation of China (NSFC) [11861131005]
- Deutsche Forschungsgemeinschaft [OH 75/3-1]
By pulsed laser irradiation with a collimated beam, temporally and spatially controlled nucleation of bulk nanobubbles in water was successfully demonstrated. This technique shows potential for testing theories on the existence of stable bulk nanobubbles.
We demonstrate the temporally and spatially controlled nucleation of bulk nanobubbles in water through pulsed laser irradiation with a collimated beam. Transient bubbles appear within the light exposed region once a tension wave passes through. The correlation between illumination and cavitation nucleation provides evidence that gaseous nanobubbles are nucleated in the liquid by a laser pulse with an intensity above 58 MW/cm(2). We estimate the radius of the nanobubbles through microscopic high-speed imaging and by solving the diffusion equation to be below 420 nm for similar to 80% of the bubble population. This technique may provide a novel approach to test theories on existence of stable bulk nanobubbles.
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