--- _id: '9050' abstract: - lang: eng text: Self-propelled particles can exhibit surprising non-equilibrium behaviors, and how they interact with obstacles or boundaries remains an important open problem. Here we show that chemically propelled micro-rods can be captured, with little change in their speed, into close orbits around solid spheres resting on or near a horizontal plane. We show that this interaction between sphere and particle is short-range, occurring even for spheres smaller than the particle length, and for a variety of sphere materials. We consider a simple model, based on lubrication theory, of a force- and torque-free swimmer driven by a surface slip (the phoretic propulsion mechanism) and moving near a solid surface. The model demonstrates capture, or movement towards the surface, and yields speeds independent of distance. This study reveals the crucial aspects of activity–driven interactions of self-propelled particles with passive objects, and brings into question the use of colloidal tracers as probes of active matter. article_number: '1784' article_processing_charge: No article_type: original author: - first_name: Daisuke full_name: Takagi, Daisuke last_name: Takagi - first_name: Jérémie A full_name: Palacci, Jérémie A id: 8fb92548-2b22-11eb-b7c1-a3f0d08d7c7d last_name: Palacci orcid: 0000-0002-7253-9465 - first_name: Adam B. full_name: Braunschweig, Adam B. last_name: Braunschweig - first_name: Michael J. full_name: Shelley, Michael J. last_name: Shelley - first_name: Jun full_name: Zhang, Jun last_name: Zhang citation: ama: Takagi D, Palacci JA, Braunschweig AB, Shelley MJ, Zhang J. Hydrodynamic capture of microswimmers into sphere-bound orbits. Soft Matter. 2014;10(11). doi:10.1039/c3sm52815d apa: Takagi, D., Palacci, J. A., Braunschweig, A. B., Shelley, M. J., & Zhang, J. (2014). Hydrodynamic capture of microswimmers into sphere-bound orbits. Soft Matter. Royal Society of Chemistry . https://doi.org/10.1039/c3sm52815d chicago: Takagi, Daisuke, Jérémie A Palacci, Adam B. Braunschweig, Michael J. Shelley, and Jun Zhang. “Hydrodynamic Capture of Microswimmers into Sphere-Bound Orbits.” Soft Matter. Royal Society of Chemistry , 2014. https://doi.org/10.1039/c3sm52815d. ieee: D. Takagi, J. A. Palacci, A. B. Braunschweig, M. J. Shelley, and J. Zhang, “Hydrodynamic capture of microswimmers into sphere-bound orbits,” Soft Matter, vol. 10, no. 11. Royal Society of Chemistry , 2014. ista: Takagi D, Palacci JA, Braunschweig AB, Shelley MJ, Zhang J. 2014. Hydrodynamic capture of microswimmers into sphere-bound orbits. Soft Matter. 10(11), 1784. mla: Takagi, Daisuke, et al. “Hydrodynamic Capture of Microswimmers into Sphere-Bound Orbits.” Soft Matter, vol. 10, no. 11, 1784, Royal Society of Chemistry , 2014, doi:10.1039/c3sm52815d. short: D. Takagi, J.A. Palacci, A.B. Braunschweig, M.J. Shelley, J. Zhang, Soft Matter 10 (2014). date_created: 2021-02-01T13:43:31Z date_published: 2014-03-21T00:00:00Z date_updated: 2023-02-23T13:47:35Z day: '21' doi: 10.1039/c3sm52815d extern: '1' external_id: arxiv: - '1309.5662' pmid: - '24800268' intvolume: ' 10' issue: '11' keyword: - General Chemistry - Condensed Matter Physics language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1309.5662 month: '03' oa: 1 oa_version: Preprint pmid: 1 publication: Soft Matter publication_identifier: eissn: - 1744-6848 issn: - 1744-683X publication_status: published publisher: 'Royal Society of Chemistry ' quality_controlled: '1' scopus_import: '1' status: public title: Hydrodynamic capture of microswimmers into sphere-bound orbits type: journal_article user_id: D865714E-FA4E-11E9-B85B-F5C5E5697425 volume: 10 year: '2014' ...