Field synchronized bidirectional current in confined driven colloids
We investigate the collective colloidal current that emerges when strongly confined magnetic microspheres are subjected to a biased, but spatially uniform, precessing magnetic field. We observe a net bidirectional current composed of colloidal particles which periodically meet assembling into rotati...
| Autores: | ; ; ; ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/149287 |
| Acceso en línea: | https://hdl.handle.net/2445/149287 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Col·loides Camps magnètics Moviment brownià Colloids Magnetic fields Brownian movements |
| _version_ | 1878729628038725632 |
|---|---|
| author | Meng, Fanlong |
| author2 | Ortiz-Ambriz, Antonio Massana-Cid, Helena Vilfan, Andrej Golestanian, Ramin Tierno, Pietro |
| author2_role | author author author author author |
| author_browse | Golestanian, Ramin Massana-Cid, Helena Meng, Fanlong Ortiz-Ambriz, Antonio Tierno, Pietro Vilfan, Andrej |
| author_facet | Meng, Fanlong Ortiz-Ambriz, Antonio Massana-Cid, Helena Vilfan, Andrej Golestanian, Ramin Tierno, Pietro |
| author_role | author |
| collection | Dipòsit Digital de la UB |
| description | We investigate the collective colloidal current that emerges when strongly confined magnetic microspheres are subjected to a biased, but spatially uniform, precessing magnetic field. We observe a net bidirectional current composed of colloidal particles which periodically meet assembling into rotating dimers, and exchange their positions in a characteristic, 'ceilidh'-like dance. We develop a theoretical model which explains the physics of the observed phenomena as dimer rupture and onset of current, showing agreement with Brownian dynamic simulations. By varying the tilt angle and the frequency of the applied field, we discover two separate transport mechanisms based on different ways the dimers break up during particle transport. Our results demonstrate an effective technique to drive microscale matter by using a combination of confinement and homogeneous field modulations, not based on any gradient of the applied field. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_0bbe7055e389bc0105fdcfeeb3257f52 |
| institution | Universidad de Barcelona |
| instname_str | Universidad de Barcelona |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:diposit.ub.edu:2445/149287 |
| publishDate | 2020 |
| publishDateSort | 2020 |
| publisher | American Physical Society |
| publisherStr | American Physical Society |
| reponame_str | Dipòsit Digital de la UB |
| spelling | Field synchronized bidirectional current in confined driven colloids Meng, Fanlong Ortiz-Ambriz, Antonio Massana-Cid, Helena Vilfan, Andrej Golestanian, Ramin Tierno, Pietro Col·loides Camps magnètics Moviment brownià Colloids Magnetic fields Brownian movements We investigate the collective colloidal current that emerges when strongly confined magnetic microspheres are subjected to a biased, but spatially uniform, precessing magnetic field. We observe a net bidirectional current composed of colloidal particles which periodically meet assembling into rotating dimers, and exchange their positions in a characteristic, 'ceilidh'-like dance. We develop a theoretical model which explains the physics of the observed phenomena as dimer rupture and onset of current, showing agreement with Brownian dynamic simulations. By varying the tilt angle and the frequency of the applied field, we discover two separate transport mechanisms based on different ways the dimers break up during particle transport. Our results demonstrate an effective technique to drive microscale matter by using a combination of confinement and homogeneous field modulations, not based on any gradient of the applied field. American Physical Society https://hdl.handle.net/2445/149287 |
| spellingShingle | Field synchronized bidirectional current in confined driven colloids Meng, Fanlong Col·loides Camps magnètics Moviment brownià Colloids Magnetic fields Brownian movements |
| status_str | publishedVersion |
| title | Field synchronized bidirectional current in confined driven colloids |
| title_full | Field synchronized bidirectional current in confined driven colloids |
| title_fullStr | Field synchronized bidirectional current in confined driven colloids |
| title_full_unstemmed | Field synchronized bidirectional current in confined driven colloids |
| title_short | Field synchronized bidirectional current in confined driven colloids |
| title_sort | Field synchronized bidirectional current in confined driven colloids |
| topic | Col·loides Camps magnètics Moviment brownià Colloids Magnetic fields Brownian movements |
| topic_facet | Col·loides Camps magnètics Moviment brownià Colloids Magnetic fields Brownian movements |
| url | https://hdl.handle.net/2445/149287 |