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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cellulose Based Photonic Materials Displaying Direction Modulated Photoluminescence

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Author(s):
Santos, Moliria V. [1, 2] ; Maturi, Fernando E. [1, 2] ; Pecoraro, Edison [1] ; Barud, Hernane S. [3] ; Lima, Lais R. [1] ; Ferreira, Rute A. S. [2] ; Carlos, Luis D. [2] ; Ribeiro, Sidney J. L. [1]
Total Authors: 8
Affiliation:
[1] Sao Paulo State Univ UNESP, Inst Chem, Araraquara, SP - Brazil
[2] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Phys, Aveiro - Portugal
[3] Univ Araraquara, Biopolymers & Biomat Lab, Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY; v. 9, MAR 30 2021.
Web of Science Citations: 0
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. (AU)

FAPESP's process: 14/12424-2 - Optical properties of colloidal suspensions and films based on nanocelluloses and lanthanides
Grantee:Moliria Vieira dos Santos
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/11591-8 - Femtosecond laser micro-structuring in biopolymers of celulose and fibroin: fabrication of photonic devices
Grantee:Moliria Vieira dos Santos
Support Opportunities: Scholarships in Brazil - Post-Doctoral