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

Binglin Zeng, Kai Leong Chong, Yuliang Wang*, Christian Diddens, Xiaolai Li, Marvin Detert, Harold J.W. Zandvliet, Detlef Lohse*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
14 Downloads (Pure)

Abstract

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'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.

Original languageEnglish
Article numbere2103215118
JournalProceedings of the National Academy of Sciences of the United States of America
Volume118
Issue number23
Early online date4 Jun 2021
DOIs
Publication statusPublished - 8 Jun 2021

Keywords

  • binary liquids
  • bubble bouncing
  • Marangoni force
  • phase transition
  • plasmonic bubbles
  • Phase transisition&nbsp

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