All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer Separation
We present a sessile droplet manipulation platform that enables the formation and transport of a droplet on a light-absorbing surface via local laser-beam irradiation. The mechanism relies on solutocapillary Marangoni flow arising from a concentration gradient in a binary mixture liquid. Because the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/14/7/1460 |
| _version_ | 1797588224795738112 |
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| author | Yuka Takamatsu Chizuru Yamato Masashi Kuwahara Yuta Saito Toshiharu Saiki |
| author_facet | Yuka Takamatsu Chizuru Yamato Masashi Kuwahara Yuta Saito Toshiharu Saiki |
| author_sort | Yuka Takamatsu |
| collection | DOAJ |
| description | We present a sessile droplet manipulation platform that enables the formation and transport of a droplet on a light-absorbing surface via local laser-beam irradiation. The mechanism relies on solutocapillary Marangoni flow arising from a concentration gradient in a binary mixture liquid. Because the mixture is strongly confined in a two-dimensional slit with a spacing of a few micrometers, the wetting film is stably sustained, enabling the rapid formation, deformation, and transport of a sessile droplet. In addition, to sustain the droplet in the absence of laser irradiation, we developed a method to bridge the droplet between the top and bottom walls of the slit. The bridge is stably sustained because of the hydrophilicity of the slit wall. Splitting and merging of the droplet bridges are also demonstrated. |
| first_indexed | 2024-03-11T00:49:07Z |
| format | Article |
| id | doaj.art-a940fe255eb0484190f87f4814352153 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-11T00:49:07Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-a940fe255eb0484190f87f48143521532023-11-18T20:33:45ZengMDPI AGMicromachines2072-666X2023-07-01147146010.3390/mi14071460All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer SeparationYuka Takamatsu0Chizuru Yamato1Masashi Kuwahara2Yuta Saito3Toshiharu Saiki4Graduate School of Science and Technology, Keio University, Yokohama 223-8522, Kanagawa, JapanGraduate School of Science and Technology, Keio University, Yokohama 223-8522, Kanagawa, JapanNational Institute of Advanced Industrial Science and Technology, Tsukuba 305-8560, Ibaraki, JapanNational Institute of Advanced Industrial Science and Technology, Tsukuba 305-8560, Ibaraki, JapanGraduate School of Science and Technology, Keio University, Yokohama 223-8522, Kanagawa, JapanWe present a sessile droplet manipulation platform that enables the formation and transport of a droplet on a light-absorbing surface via local laser-beam irradiation. The mechanism relies on solutocapillary Marangoni flow arising from a concentration gradient in a binary mixture liquid. Because the mixture is strongly confined in a two-dimensional slit with a spacing of a few micrometers, the wetting film is stably sustained, enabling the rapid formation, deformation, and transport of a sessile droplet. In addition, to sustain the droplet in the absence of laser irradiation, we developed a method to bridge the droplet between the top and bottom walls of the slit. The bridge is stably sustained because of the hydrophilicity of the slit wall. Splitting and merging of the droplet bridges are also demonstrated.https://www.mdpi.com/2072-666X/14/7/1460sessile dropletlaser heatingsolutocapillary Marangoni flowbinary mixture liquidphase-change material |
| spellingShingle | Yuka Takamatsu Chizuru Yamato Masashi Kuwahara Yuta Saito Toshiharu Saiki All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer Separation Micromachines sessile droplet laser heating solutocapillary Marangoni flow binary mixture liquid phase-change material |
| title | All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer Separation |
| title_full | All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer Separation |
| title_fullStr | All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer Separation |
| title_full_unstemmed | All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer Separation |
| title_short | All-Optical Rapid Formation, Transport, and Sustenance of a Sessile Droplet in a Two-Dimensional Slit with Few-Micrometer Separation |
| title_sort | all optical rapid formation transport and sustenance of a sessile droplet in a two dimensional slit with few micrometer separation |
| topic | sessile droplet laser heating solutocapillary Marangoni flow binary mixture liquid phase-change material |
| url | https://www.mdpi.com/2072-666X/14/7/1460 |
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