Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves
Recent research has shown that interactions between acoustic waves and microfluidic channels can generate microscale interference patterns with the application of a traveling surface acoustic wave (SAW), effectively creating standing wave patterns with a traveling wave. Forces arising from this inte...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Royal Society of Chemistry (RSC)
2019
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| Online Access: | https://hdl.handle.net/1721.1/122947 |
| _version_ | 1826211945145958400 |
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| author | Collins, David J. O’Rorke, Richard Neild, Adrian Han, Jongyoon Ai, Ye |
| author2 | Massachusetts Institute of Technology. Department of Biological Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Biological Engineering Collins, David J. O’Rorke, Richard Neild, Adrian Han, Jongyoon Ai, Ye |
| author_sort | Collins, David J. |
| collection | MIT |
| description | Recent research has shown that interactions between acoustic waves and microfluidic channels can generate microscale interference patterns with the application of a traveling surface acoustic wave (SAW), effectively creating standing wave patterns with a traveling wave. Forces arising from this interference can be utilized for precise manipulation of micron-sized particles and biological cells. The patterns that have been produced with this method, however, have been limited to straight lines and grids from flat channel walls, and where the spacing resulting from this interference has not previously been comprehensively explored. In this work we examine the interaction between both straight and curved channel interfaces with a SAW to derive geometrically deduced analytical models. These models predict the acoustic force-field periodicity near a channel interface as a function of its orientation to an underlying SAW, and are validated with experimental and simulation results. Notably, the spacing is larger for flat walls than for curved ones and is dependent on the ratio of sound speeds in the substrate and fluid. Generating these force-field gradients with only travelling waves has wide applications in acoustofluidic systems, where channel interfaces can potentially support a range of patterning, concentration, focusing and separation activities by creating locally defined acoustic forces. |
| first_indexed | 2024-09-23T15:13:53Z |
| format | Article |
| id | mit-1721.1/122947 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:13:53Z |
| publishDate | 2019 |
| publisher | Royal Society of Chemistry (RSC) |
| record_format | dspace |
| spelling | mit-1721.1/1229472022-10-02T01:32:15Z Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves Collins, David J. O’Rorke, Richard Neild, Adrian Han, Jongyoon Ai, Ye Massachusetts Institute of Technology. Department of Biological Engineering Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Recent research has shown that interactions between acoustic waves and microfluidic channels can generate microscale interference patterns with the application of a traveling surface acoustic wave (SAW), effectively creating standing wave patterns with a traveling wave. Forces arising from this interference can be utilized for precise manipulation of micron-sized particles and biological cells. The patterns that have been produced with this method, however, have been limited to straight lines and grids from flat channel walls, and where the spacing resulting from this interference has not previously been comprehensively explored. In this work we examine the interaction between both straight and curved channel interfaces with a SAW to derive geometrically deduced analytical models. These models predict the acoustic force-field periodicity near a channel interface as a function of its orientation to an underlying SAW, and are validated with experimental and simulation results. Notably, the spacing is larger for flat walls than for curved ones and is dependent on the ratio of sound speeds in the substrate and fluid. Generating these force-field gradients with only travelling waves has wide applications in acoustofluidic systems, where channel interfaces can potentially support a range of patterning, concentration, focusing and separation activities by creating locally defined acoustic forces. 2019-11-15T16:11:55Z 2019-11-15T16:11:55Z 2019-10 2019-05 2019-11-07T15:00:08Z Article http://purl.org/eprint/type/JournalArticle 1744-683X 1744-6848 https://hdl.handle.net/1721.1/122947 Collins, David J., et al. "Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves." Soft Matter, 15, 43 (November 2019): 8691-8705 © 2019 Royal Society of Chemistry en http://dx.doi.org/10.1103/10.1039/c9sm00946a Soft matter Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Royal Society of Chemistry (RSC) Prof. Han via Phoebe Ayers |
| spellingShingle | Collins, David J. O’Rorke, Richard Neild, Adrian Han, Jongyoon Ai, Ye Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves |
| title | Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves |
| title_full | Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves |
| title_fullStr | Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves |
| title_full_unstemmed | Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves |
| title_short | Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves |
| title_sort | acoustic fields and microfluidic patterning around embedded micro structures subject to surface acoustic waves |
| url | https://hdl.handle.net/1721.1/122947 |
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