{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T15:55:43Z","timestamp":1792425343648,"version":"4.5.0"},"reference-count":41,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2021,12,10]],"date-time":"2021-12-10T00:00:00Z","timestamp":1639094400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2022,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Photonic microbeads containing crystalline colloidal arrays are promising as a key component of structural\u2010color inks for various applications including printings, paintings, and cosmetics. However, structural colors from microbeads usually have low color saturation and the production of the beads requires delicate and time\u2010consuming protocols. Herein, elastic photonic microbeads are designed with enhanced color saturation through facile photocuring of oil\u2010in\u2010oil emulsion droplets. Dispersions of highly\u2010concentrated silica particles in elastomer precursors are microfluidically emulsified into immiscible oil to produce monodisperse droplets. The silica particles spontaneously form crystalline arrays in the entire volume of the droplets due to interparticle repulsion which is unperturbed by the diffusion of the surrounding oil whereas weakened for oil\u2010in\u2010water droplets. The crystalline arrays are permanently stabilized by photopolymerization of the precursor, forming elastic photonic microbeads. The microbeads are transferred into the refractive\u2010index\u2010matched biocompatible oil. The high crystallinity of colloidal arrays increases the reflectivity at stopband and the index matching reduces incoherent scattering at the surface of the microbeads, enhancing color saturation. The colors can be adjusted by mixing two distinctly colored microbeads. Also, low stiffness and high elasticity reduce foreign\u2010body sensation and enhance fluidity, potentially serving as pragmatic structural colorants for photonic inks.<\/jats:p>","DOI":"10.1002\/smll.202105225","type":"journal-article","created":{"date-parts":[[2021,12,10]],"date-time":"2021-12-10T05:25:17Z","timestamp":1639113917000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Photonic Microbeads Templated by Oil\u2010in\u2010Oil Emulsion Droplets for High Saturation of Structural Colors"],"prefix":"10.1002","volume":"18","author":[{"given":"Jong Hyun","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)  Daejeon 34141 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jong Bin","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)  Daejeon 34141 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ye Hun","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)  Daejeon 34141 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sanghyuk","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)  Daejeon 34141 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4095-5779","authenticated-orcid":false,"given":"Shin\u2010Hyun","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering Korea Advanced Institute of 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