Vibration Induced Transport of Enclosed Droplets
| Autor: | Hal R. Holmes, Karl F. Böhringer |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
Materials science lcsh:Mechanical engineering and machinery Ratchet Microfluidics Evaporation Enclosure microfluidics 02 engineering and technology Fixture Edge (geometry) 010402 general chemistry 01 natural sciences Article vibrations lcsh:TJ1-1570 Electrical and Electronic Engineering Mechanical Engineering Mechanics 021001 nanoscience & nanotechnology 0104 chemical sciences Vibration Control and Systems Engineering transport droplet 0210 nano-technology |
| Zdroj: | Micromachines Volume 10 Issue 1 Micromachines, Vol 10, Iss 1, p 69 (2019) |
| ISSN: | 2072-666X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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