{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T18:35:59Z","timestamp":1770575759700,"version":"3.49.0"},"reference-count":38,"publisher":"Wiley","issue":"20","license":[{"start":{"date-parts":[[2023,2,15]],"date-time":"2023-02-15T00:00:00Z","timestamp":1676419200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100003246","name":"Nederlandse Organisatie voor Wetenschappelijk Onderzoek","doi-asserted-by":"publisher","award":["TOP\u2010PUNT 718.016.003"],"award-info":[{"award-number":["TOP\u2010PUNT 718.016.003"]}],"id":[{"id":"10.13039\/501100003246","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003130","name":"Fonds Wetenschappelijk Onderzoek","doi-asserted-by":"publisher","award":["G09201N"],"award-info":[{"award-number":["G09201N"]}],"id":[{"id":"10.13039\/501100003130","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2023,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Liquid crystalline polymers are attractive materials for untethered miniature soft robots. When they contain azo dyes, they acquire light\u2010responsive actuation properties. However, the manipulation of such photoresponsive polymers at the micrometer scale remains largely unexplored. Here, uni\u2010 and bidirectional rotation and speed control of polymerized azo\u2010containing chiral liquid crystalline photonic microparticles powered by light is reported. The rotation of these polymer particles is first studied in an optical trap experimentally and theoretically. The micro\u2010sized polymer particles respond to the handedness of a circularly polarized trapping laser due to their chirality and exhibit uni\u2010 and bidirectional rotation depending on their alignment within the optical tweezers. The attained optical torque causes the particles to spin with a rotation rate of several hertz. The angular speed can be controlled by small structural changes, induced by ultraviolet (UV) light absorption. After switching off the UV illumination, the particle recovers its rotation speed. The results provide evidence of uni\u2010 and bidirectional motion and speed control in light\u2010responsive polymer particles and offer a new way to devise light\u2010controlled rotary microengines at the micrometer scale.<\/jats:p>","DOI":"10.1002\/smll.202207095","type":"journal-article","created":{"date-parts":[[2023,2,16]],"date-time":"2023-02-16T05:50:03Z","timestamp":1676526603000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Uni\u2010 and Bidirectional Rotation and Speed Control in Chiral Photonic Micromotors Powered by Light"],"prefix":"10.1002","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4779-9046","authenticated-orcid":false,"given":"Yera Ye.","family":"Ussembayev","sequence":"first","affiliation":[{"name":"LCP research group Ghent University  Technologiepark 126 Gent 9052 Belgium"},{"name":"Center for Nano and Biophotonics Ghent University  Technologiepark 126 Gent 9052 Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noah","family":"De Witte","sequence":"additional","affiliation":[{"name":"LCP research group Ghent University  Technologiepark 126 Gent 9052 Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaohong","family":"Liu","sequence":"additional","affiliation":[{"name":"Stimuli\u2010responsive Functional Materials and Devices Eindhoven University of Technology  Eindhoven 5600 MB The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0172-7557","authenticated-orcid":false,"given":"Alberto","family":"Belmonte","sequence":"additional","affiliation":[{"name":"Stimuli\u2010responsive Functional Materials and Devices Eindhoven University of Technology  Eindhoven 5600 MB The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6325-5922","authenticated-orcid":false,"given":"Tom","family":"Bus","sequence":"additional","affiliation":[{"name":"Stimuli\u2010responsive Functional Materials and Devices Eindhoven University of Technology  Eindhoven 5600 MB The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sjoukje","family":"Lubach","sequence":"additional","affiliation":[{"name":"Stimuli\u2010responsive Functional Materials and Devices Eindhoven University of Technology  Eindhoven 5600 MB The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3413-0829","authenticated-orcid":false,"given":"Filip","family":"Beunis","sequence":"additional","affiliation":[{"name":"LCP research group Ghent University  Technologiepark 126 Gent 9052 Belgium"},{"name":"Center for Nano and Biophotonics Ghent University  Technologiepark 126 Gent 9052 Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0078-3888","authenticated-orcid":false,"given":"Filip","family":"Strubbe","sequence":"additional","affiliation":[{"name":"LCP research group Ghent University  Technologiepark 126 Gent 9052 Belgium"},{"name":"Center for Nano and Biophotonics Ghent University  Technologiepark 126 Gent 9052 Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3485-1984","authenticated-orcid":false,"given":"Albert P. 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