Flexible random lasers in dye-doped bio-degradable cellulose nanocrystalline needles

Gleice C. M. Germano, Yan D. R. Machado, Lucas Martinho, Susete N. Fernandes, Antonio Mario L. M. Costa, Edison Pecoraro, Anderson S. L. Gomes, Isabel C. S. Carvalho

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
11 Downloads (Pure)


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.

Original languageEnglish
Pages (from-to)24-29
Number of pages6
JournalJournal of the Optical Society of America B: Optical Physics
Issue number1
Publication statusPublished - 1 Jan 2020


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