Physics of Fluids - Publications

Periodic bouncing of a plasmonic bubble in a binary liquid by competing solutal and thermal Marangoni forces

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Proceedings of the National Academy of Sciences 118, 23 (2021)

Authors

	Binglin Zeng
	Steven Chong
	Yuliang Wang
	Christian Diddens
	Xiaolai Li
	Marvin Wilhelm Detert
	Harold J. W. Zandvliet
	Detlef Lohse

BibTeΧ

@article {Zenge2103215118,
	author = {Zeng, Binglin and Chong, Kai Leong and Wang, Yuliang and Diddens, Christian and Li, Xiaolai and Detert, Marvin and Zandvliet, Harold J. W. and Lohse, Detlef},
	title = {Periodic bouncing of a plasmonic bubble in a binary liquid by competing solutal and thermal Marangoni forces},
	volume = {118},
	number = {23},
	elocation-id = {e2103215118},
	year = {2021},
	doi = {10.1073/pnas.2103215118},
	publisher = {National Academy of Sciences},
	abstract = {Plasmonic bubbles are relevant in biomedical diagnosis and therapy, catalysis, and micro- and nanomanipulation. Hitherto, their behavior has mainly been analyzed in pure liquids. However, in general, these applications of plasmonic bubbles take place in binary or multicomponent liquids. Here we show that plasmonic bubbles in a binary liquid display surprising phenomena, resulting from the emerging complicated physicochemical hydrodynamics of a vapor bubble in such binary liquids. Depending on the application, these phenomena can be either a benefit or a hindrance. Our results are also relevant for other bubble nucleation processes in multicomponent liquids, such as boiling, electrolysis, or catalysis.The physicochemical hydrodynamics of bubbles and droplets out of equilibrium, in particular with phase transitions, display surprisingly rich and often counterintuitive phenomena. Here we experimentally and theoretically study the nucleation and early evolution of plasmonic bubbles in a binary liquid consisting of water and ethanol. Remarkably, the submillimeter plasmonic bubble is found to be periodically attracted to and repelled from the nanoparticle-decorated substrate, with frequencies of around a few kilohertz. We identify the competition between solutal and thermal Marangoni forces as the origin of the periodic bouncing. The former arises due to the selective vaporization of ethanol at the substrate{\textquoteright}s side of the bubble, leading to a solutal Marangoni flow toward the hot substrate, which pushes the bubble away. The latter arises due to the temperature gradient across the bubble, leading to a thermal Marangoni flow away from the substrate, which sucks the bubble toward it. We study the dependence of the frequency of the bouncing phenomenon from the control parameters of the system, namely the ethanol fraction and the laser power for the plasmonic heating. Our findings can be generalized to boiling and electrolytically or catalytically generated bubbles in multicomponent liquids.All study data are included in this article and/or SI Appendix.},
	issn = {0027-8424},
	URL = {https://www.pnas.org/content/118/23/e2103215118},
	eprint = {https://www.pnas.org/content/118/23/e2103215118.full.pdf},
	journal = {Proceedings of the National Academy of Sciences}
}