Bidirectional zigzag growth from clusters of active colloidal shakers
Driven or self-propelling particles moving in viscoelastic fluids recently emerged as a novel class of active systems showing a complex yet rich set of phenomena due to the non-Newtonian nature of the dispersing medium. Here we investigate the one-dimensional growth of clusters made of active colloi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2024-03-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.013287 |
| _version_ | 1797210243067805696 |
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| author | Gaspard Junot Andrés Javier Manzano González Pietro Tierno |
| author_facet | Gaspard Junot Andrés Javier Manzano González Pietro Tierno |
| author_sort | Gaspard Junot |
| collection | DOAJ |
| description | Driven or self-propelling particles moving in viscoelastic fluids recently emerged as a novel class of active systems showing a complex yet rich set of phenomena due to the non-Newtonian nature of the dispersing medium. Here we investigate the one-dimensional growth of clusters made of active colloidal shakers, which are realized by oscillating magnetic rotors dispersed within a viscoelastic fluid and at different concentrations of the dissolved polymer. These magnetic particles when actuated by an oscillating field display a flow profile similar to that of a shaker force dipole, i.e., without any net propulsion. We design a protocol to assemble clusters of colloidal shakers and induce their controlled expansion into elongated zigzag structures. We observe a power law growth of the mean chain length and use theoretical arguments to explain the measured 1/3 exponent. These arguments agree well with both experiments and particle based numerical simulations. |
| first_indexed | 2024-04-24T10:07:29Z |
| format | Article |
| id | doaj.art-898925ea303346759c3cdbc2fb806e8d |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:07:29Z |
| publishDate | 2024-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-898925ea303346759c3cdbc2fb806e8d2024-04-12T17:40:29ZengAmerican Physical SocietyPhysical Review Research2643-15642024-03-016101328710.1103/PhysRevResearch.6.013287Bidirectional zigzag growth from clusters of active colloidal shakersGaspard JunotAndrés Javier Manzano GonzálezPietro TiernoDriven or self-propelling particles moving in viscoelastic fluids recently emerged as a novel class of active systems showing a complex yet rich set of phenomena due to the non-Newtonian nature of the dispersing medium. Here we investigate the one-dimensional growth of clusters made of active colloidal shakers, which are realized by oscillating magnetic rotors dispersed within a viscoelastic fluid and at different concentrations of the dissolved polymer. These magnetic particles when actuated by an oscillating field display a flow profile similar to that of a shaker force dipole, i.e., without any net propulsion. We design a protocol to assemble clusters of colloidal shakers and induce their controlled expansion into elongated zigzag structures. We observe a power law growth of the mean chain length and use theoretical arguments to explain the measured 1/3 exponent. These arguments agree well with both experiments and particle based numerical simulations.http://doi.org/10.1103/PhysRevResearch.6.013287 |
| spellingShingle | Gaspard Junot Andrés Javier Manzano González Pietro Tierno Bidirectional zigzag growth from clusters of active colloidal shakers Physical Review Research |
| title | Bidirectional zigzag growth from clusters of active colloidal shakers |
| title_full | Bidirectional zigzag growth from clusters of active colloidal shakers |
| title_fullStr | Bidirectional zigzag growth from clusters of active colloidal shakers |
| title_full_unstemmed | Bidirectional zigzag growth from clusters of active colloidal shakers |
| title_short | Bidirectional zigzag growth from clusters of active colloidal shakers |
| title_sort | bidirectional zigzag growth from clusters of active colloidal shakers |
| url | http://doi.org/10.1103/PhysRevResearch.6.013287 |
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