Author(s): Germano, Gleice C.M. ; Machado, Yan D.R. ; Martinho, Lucas ; Fernandes, Susete N. ; Costa, Antonio Mario L.M. ; Pecoraro, Edison [UNESP] ; Gomes, Anderson S.L. ; Carvalho, Isabel C.S.
Date: 2020
Persistent ID: http://hdl.handle.net/11449/201516
Origin: Oasisbr
Made available in DSpace on 2020-12-12T02:34:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
In this work, we developed and investigated a random laser based on rhodamine6G (Rh6G) in ethylene glycol (EG) solution with varying cellulose nanocrystalline (CNC) needles as scatterers in the lasing media. Besides the suspension-in-cuvette scheme, an alternative configuration was also employed: a dye-CNC flexible self-supported thick-film (70 µm) random laser made by drop casting of the CNCs + Rh6G + hydroxypropyl cellulose suspension. In relation to conventional scatterers, the biodegradable cellulose nanocompounds showed a comparable reduction in both the spectral full width at half-maximum and the energy threshold values, with an optimal concentration of 5 mg [CNC]/ml[EG] in suspension. Its performance was also compared with other cellulose-based random lasers, presenting advantages for some parameters. The flexible film configuration showed similar results, but contained 10% less Rh6G than the suspension.
Physics Department Pontifical Catholic University of Rio de Janeiro
i3N/CENIMAT Department of Materials Science Faculty of Science and Technology Universidade NOVA de Lisboa Campus de Caparica
Department of Chemical and Materials Engineering Pontifical Catholic University of Rio de Janeiro
Institute of Chemistry UNESP-São Paulo State University
Physics Department Universidade Federal de Pernambuco
Institute of Chemistry UNESP-São Paulo State University
