Viscophoretic particle transport
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2022
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| Soggetti: | |
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| _version_ | 1866915143516946432 |
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| author | Khandan, Vahid Boerkamp, Vincent Jabermoradi, Abbas Fontana, Mattia Hohlbein, Johannes Verpoorte, Elisabeth Chiechi, Ryan C. Mathwig, Klaus |
| author_facet | Khandan, Vahid Boerkamp, Vincent Jabermoradi, Abbas Fontana, Mattia Hohlbein, Johannes Verpoorte, Elisabeth Chiechi, Ryan C. Mathwig, Klaus |
| contents | Viscosity is a fundamental property of liquids and determines the diffusivity of suspended particles. A gradient in viscosity leads to a gradient in diffusivity, yet it is unknown whether such a gradient can lead to directed transport of particles. In this work, we generate a steep, stable viscosity gradient in a microfluidic channel and image the resulting transport of suspended nanoparticles at the single-particle level using high-resolution microscopy. We observe high viscophoretic drift velocities that significantly exceed theoretical predictions. In addition, we utilize viscophoresis for a new type of particle trap. We provide a first quantification of a transport phenomenon that is of importance in any system and any application exhibiting viscosity gradients, for example in separation using membrane technology as well as in inter- and intracellular biomolecular transport. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_11503 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Viscophoretic particle transport Khandan, Vahid Boerkamp, Vincent Jabermoradi, Abbas Fontana, Mattia Hohlbein, Johannes Verpoorte, Elisabeth Chiechi, Ryan C. Mathwig, Klaus Fluid Dynamics Viscosity is a fundamental property of liquids and determines the diffusivity of suspended particles. A gradient in viscosity leads to a gradient in diffusivity, yet it is unknown whether such a gradient can lead to directed transport of particles. In this work, we generate a steep, stable viscosity gradient in a microfluidic channel and image the resulting transport of suspended nanoparticles at the single-particle level using high-resolution microscopy. We observe high viscophoretic drift velocities that significantly exceed theoretical predictions. In addition, we utilize viscophoresis for a new type of particle trap. We provide a first quantification of a transport phenomenon that is of importance in any system and any application exhibiting viscosity gradients, for example in separation using membrane technology as well as in inter- and intracellular biomolecular transport. |
| title | Viscophoretic particle transport |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2212.11503 |