Lorentz Force-Driven Autonomous Janus Swimmers
| Autor: | Patrick Garrigue, Gerardo Salinas, Alexander Kuhn, Kostiantyn Tieriekhov, Laurent Bouffier, Neso Sojic |
|---|---|
| Přispěvatelé: | Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2021 |
| Předmět: |
Janus particles
02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry Catalysis Quantitative Biology::Cell Behavior symbols.namesake Lorentz force Magnetohydrodynamics Colloid and Surface Chemistry Torque 14. Life underwater Magnetohydrodynamic drive Janus Physics::Biological Physics Dynamic chirality Chemistry Rotation around a fixed axis General Chemistry Mechanics 021001 nanoscience & nanotechnology 0104 chemical sciences Magnetic field [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Bipolar electrochemistry Orders of magnitude (time) symbols Trajectory 0210 nano-technology Microswimmers |
| Zdroj: | Journal of the American Chemical Society Journal of the American Chemical Society, American Chemical Society, 2021, 143 (32), pp.12708-12714. ⟨10.1021/jacs.1c05589⟩ |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.1c05589⟩ |
| Popis: | International audience; Autonomous swimmers have been intensively studied in recent years due to their numerous potential applications in many areas, ranging from biomedicine to environmental remediation. Their motion is based either on different self-propulsion mechanisms or on the use of various external stimuli. Herein, the synergy between the ion flux around self-electrophoretic Mg/Pt Janus swimmers and an external magnetic field is proposed as an efficient alternative mechanism to power swimmers based on the resulting Lorentz force. A strong magnetohydrodynamic effect is observed due to the orthogonal combination of magnetic field and spontaneous ionic currents, leading reciprocally to an increase of the swimmer speed by up to two orders of magnitude. Furthermore, the trajectory of the self-propelled swimmers can be controlled by the orientation of the magnetic field, due to the presence of an additional torque force caused by a vertical cation flux along the swimmer edges, resulting in predictable clockwise or anticlockwise motion. In addition, this effect is independent of the swimmer size, since a similar type of chiral motion is observed for macro-and microscale objects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|