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タイトル: | Quasi-stokeslet induced by thermoplasmonic Marangoni effect around a water vapor microbubble. |
著者: | Namura, Kyoko https://orcid.org/0000-0002-0374-4641 (unconfirmed) Nakajima, Kaoru https://orcid.org/0000-0002-5390-1262 (unconfirmed) Suzuki, Motofumi https://orcid.org/0000-0002-6473-9141 (unconfirmed) |
著者名の別形: | 名村, 今日子 中嶋, 薫 鈴木, 基史 |
発行日: | 31-Mar-2017 |
出版者: | Springer Nature |
誌名: | Scientific reports |
巻: | 7 |
論文番号: | 45776 |
抄録: | Rapid Marangoni flows around a water vapor microbubble (WVMB) is investigated using the thermoplasmonic effect of a gold nanoisland film (GNF). By focusing a laser onto the GNF, a stable WVMB with a diameter of ~10 μm is generated in degassed water, while an air bubble generated in non-degassed water is larger than 40 μm. Under continuous heating, the WVMB involves significantly rapid Marangoni flow. This flow is well-described by a stokeslet sat ~10 μm above the surface of GNF, from which the maximum flow speed around the WVMB is estimated to exceed 1 m/s. This rapid flow generation is attributed to the small bubble size, over which the temperature is graded, and the superheat at the bubble surface in contact with the GNF. It is expected to be useful not only for microfluidic mixing but also for fundamental research on viscous flow induced by a single stokeslet. |
記述: | 変幻自在のマイクロミキサー--水蒸気マイクロバブルを使った少量流体の高速撹拌に成功--. 京都大学プレスリリース. 2017-04-07. |
著作権等: | © The Author(s) 2017 This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
URI: | http://hdl.handle.net/2433/219403 |
DOI(出版社版): | 10.1038/srep45776 |
PubMed ID: | 28361949 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2017-04-07-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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