Fluid rheological effects on streaming dielectrophoresis in a post-array microchannel
© 2021 Wiley-VCH GmbH..
Recent studies have demonstrated the strong influences of fluid rheological properties on insulator-based dielectrophoresis (iDEP) in single-constriction microchannels. However, it is yet to be understood how iDEP in non-Newtonian fluids depends on the geometry of insulating structures. We report in this work an experimental study of fluid rheological effects on streaming DEP in a post-array microchannel that presents multiple contractions and expansions. The iDEP focusing and trapping of particles in a viscoelastic polyethylene oxide solution are comparable to those in a Newtonian buffer, which is consistent with the observations in a single-constriction microchannel. Similarly, the insignificant iDEP effects in a shear-thinning xanthan gum solution also agree with those in the single-constriction channel except that gel-like structures are observed to only form in the post-array microchannel under large DC electric fields. In contrast, the iDEP effects in both viscoelastic and shear-thinning polyacrylamide solution are significantly weaker than in the single-constriction channel. Moreover, instabilities occur in the electroosmotic flow and appear to be only dependent on the DC electric field. These phenomena may be associated with the dynamics of polymers as they are electrokinetically advected around and through the posts.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:43 |
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| Enthalten in: |
Electrophoresis - 43(2022), 5-6 vom: 01. März, Seite 717-723 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Bentor, Joseph [VerfasserIn] |
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| Links: |
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| Themen: |
Dielectrophoresis |
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| Anmerkungen: |
Date Completed 11.04.2022 Date Revised 11.04.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1002/elps.202100270 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM331977508 |
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| 245 | 1 | 0 | |a Fluid rheological effects on streaming dielectrophoresis in a post-array microchannel |
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| 500 | |a Date Revised 11.04.2022 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2021 Wiley-VCH GmbH. | ||
| 520 | |a Recent studies have demonstrated the strong influences of fluid rheological properties on insulator-based dielectrophoresis (iDEP) in single-constriction microchannels. However, it is yet to be understood how iDEP in non-Newtonian fluids depends on the geometry of insulating structures. We report in this work an experimental study of fluid rheological effects on streaming DEP in a post-array microchannel that presents multiple contractions and expansions. The iDEP focusing and trapping of particles in a viscoelastic polyethylene oxide solution are comparable to those in a Newtonian buffer, which is consistent with the observations in a single-constriction microchannel. Similarly, the insignificant iDEP effects in a shear-thinning xanthan gum solution also agree with those in the single-constriction channel except that gel-like structures are observed to only form in the post-array microchannel under large DC electric fields. In contrast, the iDEP effects in both viscoelastic and shear-thinning polyacrylamide solution are significantly weaker than in the single-constriction channel. Moreover, instabilities occur in the electroosmotic flow and appear to be only dependent on the DC electric field. These phenomena may be associated with the dynamics of polymers as they are electrokinetically advected around and through the posts | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Research Support, U.S. Gov't, Non-P.H.S. | |
| 650 | 4 | |a Dielectrophoresis | |
| 650 | 4 | |a Electroosmosis | |
| 650 | 4 | |a Microfluidics | |
| 650 | 4 | |a Porous media | |
| 650 | 4 | |a Shear thinning | |
| 650 | 4 | |a Viscoelastic | |
| 700 | 1 | |a Raihan, Mahmud Kamal |e verfasserin |4 aut | |
| 700 | 1 | |a McNeely, Colin |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Zhijian |e verfasserin |4 aut | |
| 700 | 1 | |a Song, Yongxin |e verfasserin |4 aut | |
| 700 | 1 | |a Xuan, Xiangchun |e verfasserin |4 aut | |
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