Reconfigurable self-assembly of photocatalytic magnetic microrobots for water purification

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dc.contributor.authorUrso, Mariocs
dc.contributor.authorUssia, Martinacs
dc.contributor.authorPeng, Xiacs
dc.contributor.authorOral, Çaatay Mertcs
dc.contributor.authorPumera, Martincs
dc.coverage.issue1cs
dc.coverage.volume14cs
dc.date.issued2023-11-01cs
dc.description.abstractThe development of artificial small-scale robotic swarms with nature-mimicking collective behaviors represents the frontier of research in robotics. While microrobot swarming under magnetic manipulation has been extensively explored, light-induced self-organization of micro- and nanorobots is still challenging. This study demonstrates the interaction-controlled, reconfigurable, reversible, and active self-assembly of TiO2/-Fe2O3 microrobots, consisting of peanut-shaped -Fe2O3 (hematite) microparticles synthesized by a hydrothermal method and covered with a thin layer of TiO2 by atomic layer deposition (ALD). Due to their photocatalytic and ferromagnetic properties, microrobots autonomously move in water under light irradiation, while a magnetic field precisely controls their direction. In the presence of H2O2 fuel, concentration gradients around the illuminated microrobots result in mutual attraction by phoretic interactions, inducing their spontaneous organization into self-propelled clusters. In the dark, clusters reversibly reconfigure into microchains where microrobots are aligned due to magnetic dipole-dipole interactions. Microrobots’ active motion and photocatalytic properties were investigated for water remediation from pesticides, obtaining the rapid degradation of the extensively used, persistent, and hazardous herbicide 2,4-Dichlorophenoxyacetic acid (2,4D). This study potentially impacts the realization of future intelligent adaptive metamachines and the application of light-powered self-propelled micro- and nanomotors toward the degradation of persistent organic pollutants (POPs) or micro- and nanoplasticsen
dc.formattextcs
dc.format.extent1-13cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationNATURE COMMUNICATIONS. 2023, vol. 14, issue 1, p. 1-13.en
dc.identifier.doi10.1038/s41467-023-42674-9cs
dc.identifier.issn2041-1723cs
dc.identifier.orcid0000-0001-7993-8138cs
dc.identifier.orcid0000-0002-3248-6725cs
dc.identifier.orcid0000-0001-5220-2104cs
dc.identifier.orcid0000-0001-5846-2951cs
dc.identifier.other186980cs
dc.identifier.researcheridF-2724-2010cs
dc.identifier.scopus57203728973cs
dc.identifier.urihttp://hdl.handle.net/11012/245174
dc.language.isoencs
dc.publisherSpringer Naturecs
dc.relation.ispartofNATURE COMMUNICATIONScs
dc.relation.urihttps://www.nature.com/articles/s41467-023-42674-9cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2041-1723/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subject2en
dc.subject4 dichlorophenoxyacetic aciden
dc.subjectferric oxideen
dc.subjectherbicideen
dc.subjecthydrogen peroxideen
dc.subjectnanoplasticen
dc.subjectpesticideen
dc.subjecttitanium dioxideen
dc.titleReconfigurable self-assembly of photocatalytic magnetic microrobots for water purificationen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-186980en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:50:35en
sync.item.modts2025.01.17 18:43:51en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Energie budoucnosti a inovacecs
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