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In this work, light and temperature responsive micrometer\u2010sized structural color actuators based on cholesteric liquid\u2010crystalline (CLC) polymer particles are presented. The particles are synthesized by suspension polymerization using a reactive CLC monomer mixture having a light responsive azobenzene dye. The particles exhibit anisotropic spot\u2010like and arc\u2010like reflective colored domains ranging from red to blue. Electron microscopy reveals a multidirectional asymmetric arrangement of the cholesteric layers in the particles and numerical simulations elucidate the anisotropic optical properties. Upon light exposure, the particles show reversible asymmetric shape deformations combined with structural color changes. When the temperature is increased above the liquid crystal\u2010isotropic phase transition temperature of the particles, the deformation is followed by a reduction or disappearance of the reflection. Such dual light and temperature responsive structural color actuators are interesting for a variety of micrometer\u2010sized devices.<\/jats:p>","DOI":"10.1002\/smll.201905219","type":"journal-article","created":{"date-parts":[[2019,12,3]],"date-time":"2019-12-03T11:32:12Z","timestamp":1575372732000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":67,"title":["Dual Light and Temperature Responsive Micrometer\u2010Sized Structural Color Actuators"],"prefix":"10.1002","volume":"16","author":[{"given":"Alberto","family":"Belmonte","sequence":"first","affiliation":[{"name":"Stimuli\u2010Responsive Functional Materials and Devices Department of Chemical Engineering Eindhoven University of Technology  P.O. Box 513 5600 MB Eindhoven The Netherlands"},{"name":"SCNU\u2010TUE Joint Laboratory of Device Integrated Responsive Materials (DIRM) South China Normal University Guangzhou Higher Education Mega Center  510006 Guangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yera Ye","family":"Ussembayev","sequence":"additional","affiliation":[{"name":"Liquid Crystals and Photonics Group Department of Electronics and Information Systems Ghent University  Tech Lane Ghent Science Park \u2013 Campus A 126 9052 Ghent Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tom","family":"Bus","sequence":"additional","affiliation":[{"name":"Stimuli\u2010Responsive Functional Materials and Devices Department of Chemical Engineering Eindhoven University of Technology  P.O. 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