Droplet Manipulation Using Acoustic Streaming Induced by a Vibrating Membrane
We present a simple method for on-demand manipulation of aqueous droplets in oil. With numerical simulations and experiments, we show that a vibrating membrane can produce acoustic streaming. By making use of this vortical flow, we manage to repulse the droplets away from the membrane edges. Then, by simply aligning the membrane at 45° to the flow, the droplets can be forced to follow the membrane's boundaries, thus steering them across streamlines and even between different oil types. We also characterize the repulsion and steering effect with various excitation voltages at different water and oil flow rates. The maximum steering frequency we have achieved is 165 Hz. The system is extremely robust and reliable: the same membrane can be reused after many days and with different oils and/or surfactants at the same operating frequency..
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2016 |
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| Erschienen: |
2016 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:88 |
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| Enthalten in: |
Analytical chemistry - 88(2016), 11, Seite 5696 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Phan, Hoang Van [VerfasserIn] |
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| 520 | |a We present a simple method for on-demand manipulation of aqueous droplets in oil. With numerical simulations and experiments, we show that a vibrating membrane can produce acoustic streaming. By making use of this vortical flow, we manage to repulse the droplets away from the membrane edges. Then, by simply aligning the membrane at 45° to the flow, the droplets can be forced to follow the membrane's boundaries, thus steering them across streamlines and even between different oil types. We also characterize the repulsion and steering effect with various excitation voltages at different water and oil flow rates. The maximum steering frequency we have achieved is 165 Hz. The system is extremely robust and reliable: the same membrane can be reused after many days and with different oils and/or surfactants at the same operating frequency. | ||
| 650 | 4 | |a Aqueous chemistry | |
| 650 | 4 | |a Analytical chemistry | |
| 650 | 4 | |a Simulation | |
| 650 | 4 | |a Surfactants | |
| 700 | 1 | |a Alan, Tuncay |4 oth | |
| 700 | 1 | |a Neild, Adrian |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |t Analytical chemistry |d Washington, DC : ACS Publ., 1947 |g 88(2016), 11, Seite 5696 |w (DE-627)129068128 |w (DE-600)1508-8 |w (DE-576)014399644 |x 0003-2700 |7 nnns |
| 773 | 1 | 8 | |g volume:88 |g year:2016 |g number:11 |g pages:5696 |
| 856 | 4 | 2 | |u http://www.ncbi.nlm.nih.gov/pubmed/27119623 |
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