Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations
We demonstrate a method for increasing the tuning ability of a standing surface acoustic wave (SSAW) for microparticles manipulation in a lab-on-a-chip (LOC) system. The simultaneous excitation of the fundamental frequency and its third harmonic, which is termed as dual-frequency excitation, to a pa...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/138173 |
| _version_ | 1811680924971040768 |
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| author | Zhou, Yufeng Sriphutkiat, Yannapol |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zhou, Yufeng Sriphutkiat, Yannapol |
| author_sort | Zhou, Yufeng |
| collection | NTU |
| description | We demonstrate a method for increasing the tuning ability of a standing surface acoustic wave (SSAW) for microparticles manipulation in a lab-on-a-chip (LOC) system. The simultaneous excitation of the fundamental frequency and its third harmonic, which is termed as dual-frequency excitation, to a pair of interdigital transducers (IDTs) could generate a new type of standing acoustic waves in a microfluidic channel. Varying the power and the phase in the dual-frequency excitation signals results in a reconfigurable field of the acoustic radiation force applied to the microparticles across the microchannel (e.g., the number and location of the pressure nodes and the microparticle concentrations at the corresponding pressure nodes). This article demonstrates that the motion time of the microparticle to only one pressure node can be reduced ~2-fold at the power ratio of the fundamental frequency greater than ~90%. In contrast, there are three pressure nodes in the microchannel if less than this threshold. Furthermore, adjusting the initial phase between the fundamental frequency and the third harmonic results in different motion rates of the three SSAW pressure nodes, as well as in the percentage of microparticles at each pressure node in the microchannel. There is a good agreement between the experimental observation and the numerical predictions. This novel excitation method can easily and non-invasively integrate into the LOC system, with a wide tenability and only a few changes to the experimental set-up. |
| first_indexed | 2024-10-01T03:32:47Z |
| format | Journal Article |
| id | ntu-10356/138173 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:32:47Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1381732023-03-04T17:22:47Z Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations Zhou, Yufeng Sriphutkiat, Yannapol School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Standing Surface Acoustic Wave Microparticle Manipulation We demonstrate a method for increasing the tuning ability of a standing surface acoustic wave (SSAW) for microparticles manipulation in a lab-on-a-chip (LOC) system. The simultaneous excitation of the fundamental frequency and its third harmonic, which is termed as dual-frequency excitation, to a pair of interdigital transducers (IDTs) could generate a new type of standing acoustic waves in a microfluidic channel. Varying the power and the phase in the dual-frequency excitation signals results in a reconfigurable field of the acoustic radiation force applied to the microparticles across the microchannel (e.g., the number and location of the pressure nodes and the microparticle concentrations at the corresponding pressure nodes). This article demonstrates that the motion time of the microparticle to only one pressure node can be reduced ~2-fold at the power ratio of the fundamental frequency greater than ~90%. In contrast, there are three pressure nodes in the microchannel if less than this threshold. Furthermore, adjusting the initial phase between the fundamental frequency and the third harmonic results in different motion rates of the three SSAW pressure nodes, as well as in the percentage of microparticles at each pressure node in the microchannel. There is a good agreement between the experimental observation and the numerical predictions. This novel excitation method can easily and non-invasively integrate into the LOC system, with a wide tenability and only a few changes to the experimental set-up. MOE (Min. of Education, S’pore) Published version 2020-04-28T01:17:55Z 2020-04-28T01:17:55Z 2018 Journal Article Zhou, Y., & Sriphutkiat, Y. (2018). Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations. Journal of Visualized Experiments, 2018(138), e58085-. doi:10.3791/58085 1940-087X https://hdl.handle.net/10356/138173 10.3791/58085 30199023 2-s2.0-85054504986 138 2018 en Journal of Visualized Experiments © 2018 Journal of Visualized Experiments. All rights reserved. This paper was published in Journal of Visualized Experiments and is made available with permission of Journal of Visualized Experiments. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Standing Surface Acoustic Wave Microparticle Manipulation Zhou, Yufeng Sriphutkiat, Yannapol Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations |
| title | Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations |
| title_full | Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations |
| title_fullStr | Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations |
| title_full_unstemmed | Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations |
| title_short | Microparticle manipulation by standing surface acoustic waves with dual-frequency excitations |
| title_sort | microparticle manipulation by standing surface acoustic waves with dual frequency excitations |
| topic | Engineering::Mechanical engineering Standing Surface Acoustic Wave Microparticle Manipulation |
| url | https://hdl.handle.net/10356/138173 |
| work_keys_str_mv | AT zhouyufeng microparticlemanipulationbystandingsurfaceacousticwaveswithdualfrequencyexcitations AT sriphutkiatyannapol microparticlemanipulationbystandingsurfaceacousticwaveswithdualfrequencyexcitations |