Cellulose Based Photonic Materials Displaying Direction Modulated Photoluminescence
authors Santos, MV; Maturi, FE; Pecoraro, E; Barud, HS; Lima, LR; Ferreira, RAS; Carlos, LD; Ribeiro, SJL
nationality International
author keywords bacterial cellulose nanocrystals; chiral nematic liquid crystal; iridescence; photonic materials; luminescence; modulated light emission; rhodamine 6G
abstract Photonic materials featuring simultaneous iridescence and light emission are an attractive alternative for designing novel optical devices. The luminescence study of a new optical material that integrates light emission and iridescence through liquid crystal self-assembly of cellulose nanocrystal-template silica approach is herein presented. These materials containing Rhodamine 6G were obtained as freestanding composite films with a chiral nematic organization. The scanning electron microscopy confirms that the cellulose nanocrystal film structure comprises multi-domain Bragg reflectors and the optical properties of these films can be tuned through changes in the relative content of silica/cellulose nanocrystals. Moreover, the incorporation of the light-emitting compound allows a complementary control of the optical properties. Overall, such findings demonstrated that the photonic structure plays the role of direction-dependent inner-filter, causing selective suppression of the light emitted with angle-dependent detection.
issn 2296-4185
year published 2021
volume 9
digital object identifier (doi) 10.3389/fbioe.2021.617328
web of science category 10
subject category Biotechnology & Applied Microbiology; Multidisciplinary Sciences
unique article identifier WOS:000639427200001
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journal impact factor 3.644
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category normalized journal impact factor percentile 72.535
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