Metallic microswimmers driven up the wall by gravity
| Autor: | Yang Wu, Michael D. Ward, Leif Ristroph, Florencio Balboa Usabiaga, Jun Zhang, Michael Shelley, Quentin Brosseau, Enkeleida Lushi |
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| Rok vydání: | 2021 |
| Předmět: |
Gravity (chemistry)
Materials science Buoyancy business.product_category genetic structures Microswimmers phoretic Janus particles media_common.quotation_subject Gravitaxis FOS: Physical sciences Condensed Matter - Soft Condensed Matter engineering.material 01 natural sciences Asymmetry Rod 010305 fluids & plasmas 0103 physical sciences Inclined plane 010306 general physics media_common Fluid Dynamics (physics.flu-dyn) Physics - Fluid Dynamics General Chemistry Mechanics Condensed Matter Physics Drag engineering Soft Condensed Matter (cond-mat.soft) Climb business human activities |
| Zdroj: | BIRD: BCAM's Institutional Repository Data instname Soft Matter |
| ISSN: | 1744-6848 1744-683X |
| Popis: | As a natural and functional behavior, various microorganisms exhibit gravitaxis by orienting and swimming upwards against gravity. Swimming autophoretic nanomotors described herein, comprising bimetallic nanorods, preferentially orient upwards and swim up along a wall, when tail-heavy (i.e. when the density of one of the metals is larger than the other). Through experiment and theory, two mechanisms were identified that contribute to this gravitactic behavior. First, a buoyancy or gravitational torque acts on these rods to align them upwards. Second, hydrodynamic interactions of the rod with the inclined wall induce a fore-aft drag asymmetry on the rods that reinforces their orientation bias and promotes their upward motion. Comment: 12 pages, 11 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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