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Acoustothermal Nucleation of Surface Nanobubbles

Saikat Datta Orcid Logo, Rohit Pillai Orcid Logo, Matthew K. Borg Orcid Logo, Khellil Sefiane

Nano Letters, Volume: 21, Issue: 3, Pages: 1267 - 1273

Swansea University Author: Saikat Datta Orcid Logo

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DOI (Published version): 10.1021/acs.nanolett.0c03895

Abstract

Ultrasonic surface vibration at high frequencies ((100 GHz)) can nucleate bubbles in a liquid within a few nanometres from a surface, but the underlying mechanism and the role of surface wettability remain poorly understood. Here, we employ molecular simulations to study and characterize this phenom...

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Published in: Nano Letters
ISSN: 1530-6984 1530-6992
Published: American Chemical Society (ACS) 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa69236
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last_indexed 2025-05-01T04:31:04Z
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spelling 2025-04-30T13:53:26.7087752 v2 69236 2025-04-07 Acoustothermal Nucleation of Surface Nanobubbles 9bd04065d05a966dd173d2f247b2b47f 0000-0001-8962-2145 Saikat Datta Saikat Datta true false 2025-04-07 ACEM Ultrasonic surface vibration at high frequencies ((100 GHz)) can nucleate bubbles in a liquid within a few nanometres from a surface, but the underlying mechanism and the role of surface wettability remain poorly understood. Here, we employ molecular simulations to study and characterize this phenomenon, which we call acoustothermal nucleation. We observe that nanobubbles can nucleate on both hydrophilic and hydrophobic surfaces, and molecular energy balances are used to identify whether these are boiling or cavitation events. We rationalize the nucleation events by defining a physics-based energy balance, which matches our simulation results. To characterize the interplay between the acoustic parameters, surface wettability, and nucleation mechanism, we produce a regime map of nanoscopic nucleation events that connects observed nanoscale results to macroscopic experiments. This work provides insights to better design a range of industrial processes and clinical procedures such as surface treatments, mass spectroscopy, and selective cell destruction. Journal Article Nano Letters 21 3 1267 1273 American Chemical Society (ACS) 1530-6984 1530-6992 acoustothermal nucleation; boiling; cavitation; nanobubbles; vibrations; wettability 10 2 2021 2021-02-10 10.1021/acs.nanolett.0c03895 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University Another institution paid the OA fee The MD simulation results were run on ARCHER, the U.K.’snational supercomputer. This research is supported by EPSRCgrants EP/N016602/1 and EP/R007438/1. 2025-04-30T13:53:26.7087752 2025-04-07T18:58:30.0705384 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Saikat Datta 0000-0001-8962-2145 1 Rohit Pillai 0000-0003-0539-7177 2 Matthew K. Borg 0000-0002-7740-1932 3 Khellil Sefiane 4 69236__34146__5ab26f0d231e4fc693764d850e128d0a.pdf 69236.VoR.pdf 2025-04-30T13:46:17.3556466 Output 10979463 application/pdf Version of Record true © 2021 The Authors. This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License. true eng https://creativecommons.org/licenses/by-nc-nd/4.0/deed.en
title Acoustothermal Nucleation of Surface Nanobubbles
spellingShingle Acoustothermal Nucleation of Surface Nanobubbles
Saikat Datta
title_short Acoustothermal Nucleation of Surface Nanobubbles
title_full Acoustothermal Nucleation of Surface Nanobubbles
title_fullStr Acoustothermal Nucleation of Surface Nanobubbles
title_full_unstemmed Acoustothermal Nucleation of Surface Nanobubbles
title_sort Acoustothermal Nucleation of Surface Nanobubbles
author_id_str_mv 9bd04065d05a966dd173d2f247b2b47f
author_id_fullname_str_mv 9bd04065d05a966dd173d2f247b2b47f_***_Saikat Datta
author Saikat Datta
author2 Saikat Datta
Rohit Pillai
Matthew K. Borg
Khellil Sefiane
format Journal article
container_title Nano Letters
container_volume 21
container_issue 3
container_start_page 1267
publishDate 2021
institution Swansea University
issn 1530-6984
1530-6992
doi_str_mv 10.1021/acs.nanolett.0c03895
publisher American Chemical Society (ACS)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description Ultrasonic surface vibration at high frequencies ((100 GHz)) can nucleate bubbles in a liquid within a few nanometres from a surface, but the underlying mechanism and the role of surface wettability remain poorly understood. Here, we employ molecular simulations to study and characterize this phenomenon, which we call acoustothermal nucleation. We observe that nanobubbles can nucleate on both hydrophilic and hydrophobic surfaces, and molecular energy balances are used to identify whether these are boiling or cavitation events. We rationalize the nucleation events by defining a physics-based energy balance, which matches our simulation results. To characterize the interplay between the acoustic parameters, surface wettability, and nucleation mechanism, we produce a regime map of nanoscopic nucleation events that connects observed nanoscale results to macroscopic experiments. This work provides insights to better design a range of industrial processes and clinical procedures such as surface treatments, mass spectroscopy, and selective cell destruction.
published_date 2021-02-10T05:28:57Z
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