Vibration Induced Transport of Enclosed Droplets
The droplet response to vibrations has been well characterized on open substrates, but microfluidic applications for droplets on open systems are limited by rapid evaporation rates and prone to environmental contamination. However, the response of enclosed droplets to vibration is less understood. H...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-01-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2072-666X/10/1/69 |
| _version_ | 1818258080864927744 |
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| author | Hal R. Holmes Karl F. Böhringer |
| author_facet | Hal R. Holmes Karl F. Böhringer |
| author_sort | Hal R. Holmes |
| collection | DOAJ |
| description | The droplet response to vibrations has been well characterized on open substrates, but microfluidic applications for droplets on open systems are limited by rapid evaporation rates and prone to environmental contamination. However, the response of enclosed droplets to vibration is less understood. Here, we investigate the effects of a dual-plate enclosure on droplet transport for the anisotropic ratchet conveyor system. This system uses an asymmetric pattern of hydrophilic rungs to transport droplets with an applied vibration. Through this work, we discovered that the addition of a substrate on top of the droplet, held in place with a 3D printed fixture, extends the functional frequency range for droplet transport and normalizes the device performance for droplets of different volumes. Furthermore, we found that the edge movements are anti-phasic between top and bottom substrates, providing a velocity profile that is correlated to vibration frequency, unlike the resonance-dependent profiles observed on open systems. These results expand the capabilities of this system, providing avenues for new applications and innovation, but also new insights for droplet mechanics in response to applied vibration. |
| first_indexed | 2024-12-12T17:53:52Z |
| format | Article |
| id | doaj.art-4fea2fec6f9a48a591b02e7b3eb43cf6 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-12-12T17:53:52Z |
| publishDate | 2019-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-4fea2fec6f9a48a591b02e7b3eb43cf62022-12-22T00:16:45ZengMDPI AGMicromachines2072-666X2019-01-011016910.3390/mi10010069mi10010069Vibration Induced Transport of Enclosed DropletsHal R. Holmes0Karl F. Böhringer1Department of Bioengineering, University of Washington, Seattle, WA 98105, USADepartment of Bioengineering, University of Washington, Seattle, WA 98105, USAThe droplet response to vibrations has been well characterized on open substrates, but microfluidic applications for droplets on open systems are limited by rapid evaporation rates and prone to environmental contamination. However, the response of enclosed droplets to vibration is less understood. Here, we investigate the effects of a dual-plate enclosure on droplet transport for the anisotropic ratchet conveyor system. This system uses an asymmetric pattern of hydrophilic rungs to transport droplets with an applied vibration. Through this work, we discovered that the addition of a substrate on top of the droplet, held in place with a 3D printed fixture, extends the functional frequency range for droplet transport and normalizes the device performance for droplets of different volumes. Furthermore, we found that the edge movements are anti-phasic between top and bottom substrates, providing a velocity profile that is correlated to vibration frequency, unlike the resonance-dependent profiles observed on open systems. These results expand the capabilities of this system, providing avenues for new applications and innovation, but also new insights for droplet mechanics in response to applied vibration.http://www.mdpi.com/2072-666X/10/1/69dropletvibrationstransportmicrofluidics |
| spellingShingle | Hal R. Holmes Karl F. Böhringer Vibration Induced Transport of Enclosed Droplets Micromachines droplet vibrations transport microfluidics |
| title | Vibration Induced Transport of Enclosed Droplets |
| title_full | Vibration Induced Transport of Enclosed Droplets |
| title_fullStr | Vibration Induced Transport of Enclosed Droplets |
| title_full_unstemmed | Vibration Induced Transport of Enclosed Droplets |
| title_short | Vibration Induced Transport of Enclosed Droplets |
| title_sort | vibration induced transport of enclosed droplets |
| topic | droplet vibrations transport microfluidics |
| url | http://www.mdpi.com/2072-666X/10/1/69 |
| work_keys_str_mv | AT halrholmes vibrationinducedtransportofencloseddroplets AT karlfbohringer vibrationinducedtransportofencloseddroplets |