Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni force
Micro-scale control of liquid/droplet motion is crucial for chemical and biochemical analysis. There are several methods to manipulate droplet motion such as the Marangoni effect which can be triggered by introducing temperature gradients on suspended droplets in mineral oil.In this study, a focused...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Results in Optics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666950122001365 |
| _version_ | 1828013473840234496 |
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| author | Zahra Saeedian Tareie Hamid Latifi Kobra Soltanlou Amir Heidariazar M. Mahdi Majidof Majid Lafouti |
| author_facet | Zahra Saeedian Tareie Hamid Latifi Kobra Soltanlou Amir Heidariazar M. Mahdi Majidof Majid Lafouti |
| author_sort | Zahra Saeedian Tareie |
| collection | DOAJ |
| description | Micro-scale control of liquid/droplet motion is crucial for chemical and biochemical analysis. There are several methods to manipulate droplet motion such as the Marangoni effect which can be triggered by introducing temperature gradients on suspended droplets in mineral oil.In this study, a focused continuous wave (CW) laser beam was used to induce the Marangoni force to separate, fuse, aggregate, and control droplets. Droplets experience a force due to an interfacial tension gradient near the locally heated area created by the laser beam. The work is done on a chamber and a microchannel platform.In order to fuse water droplets, we used an optical fiber (200-µm core and 220-µm glass cladding, which has a 0.065 numerical aperture (NA)) to direct focused laser beams into the oil medium, where the droplets were first moved to the heat source and then stopped at this point and merged a second time. Also, for the first-time droplet separation for different radii of 47 and 55 in the microchannel and droplet aggregation in the chamber was performed by the Marangoni effect. We have also examined the behavior of the droplets in relation to their size and distance from the hot spot.By controlling the incident laser power, we can manipulate the droplet to either fuse, separate or aggregate. |
| first_indexed | 2024-04-10T09:46:08Z |
| format | Article |
| id | doaj.art-21225d72e68345098d0041c0b09f2b93 |
| institution | Directory Open Access Journal |
| issn | 2666-9501 |
| language | English |
| last_indexed | 2024-04-10T09:46:08Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Optics |
| spelling | doaj.art-21225d72e68345098d0041c0b09f2b932023-02-17T04:55:56ZengElsevierResults in Optics2666-95012023-02-0110100347Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni forceZahra Saeedian Tareie0Hamid Latifi1Kobra Soltanlou2Amir Heidariazar3M. Mahdi Majidof4Majid Lafouti5Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983969411, IranLaser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983969411, Iran; Department of Physics, Shahid Beheshti University, Evin, Tehran 1983969411, Iran; Corresponding author at: Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983969411, Iran.Department of Physics, Shahid Beheshti University, Evin, Tehran 1983969411, IranDepartment of Physics, Shahid Beheshti University, Evin, Tehran 1983969411, IranDepartment of Physics, Shahid Beheshti University, Evin, Tehran 1983969411, IranLaser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran 1983969411, IranMicro-scale control of liquid/droplet motion is crucial for chemical and biochemical analysis. There are several methods to manipulate droplet motion such as the Marangoni effect which can be triggered by introducing temperature gradients on suspended droplets in mineral oil.In this study, a focused continuous wave (CW) laser beam was used to induce the Marangoni force to separate, fuse, aggregate, and control droplets. Droplets experience a force due to an interfacial tension gradient near the locally heated area created by the laser beam. The work is done on a chamber and a microchannel platform.In order to fuse water droplets, we used an optical fiber (200-µm core and 220-µm glass cladding, which has a 0.065 numerical aperture (NA)) to direct focused laser beams into the oil medium, where the droplets were first moved to the heat source and then stopped at this point and merged a second time. Also, for the first-time droplet separation for different radii of 47 and 55 in the microchannel and droplet aggregation in the chamber was performed by the Marangoni effect. We have also examined the behavior of the droplets in relation to their size and distance from the hot spot.By controlling the incident laser power, we can manipulate the droplet to either fuse, separate or aggregate.http://www.sciencedirect.com/science/article/pii/S2666950122001365ManipulationDropletNoncontactMarangoni forceFuseConvection |
| spellingShingle | Zahra Saeedian Tareie Hamid Latifi Kobra Soltanlou Amir Heidariazar M. Mahdi Majidof Majid Lafouti Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni force Results in Optics Manipulation Droplet Noncontact Marangoni force Fuse Convection |
| title | Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni force |
| title_full | Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni force |
| title_fullStr | Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni force |
| title_full_unstemmed | Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni force |
| title_short | Manipulation, aggregation, fusion and separation of droplets using laser-induced Marangoni force |
| title_sort | manipulation aggregation fusion and separation of droplets using laser induced marangoni force |
| topic | Manipulation Droplet Noncontact Marangoni force Fuse Convection |
| url | http://www.sciencedirect.com/science/article/pii/S2666950122001365 |
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