Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Quantum yield measurements by thermal lens in highly absorbing samples: The case of highly doped rhodamine B organic/silica xerogels

Full text
Author(s):
dos Santos, J. F. M. [1] ; Zanuto, V. S. [1] ; Ventura, M. [1] ; Bramorski, C. B. [1] ; Catunda, T. [1] ; Manoel, D. S. [1, 2] ; Malacarne, L. C. [3] ; de Vicente, F. S. [2]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Dept Fis, BR-13506900 Rio Claro, SP - Brazil
[3] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana - Brazil
Total Affiliations: 3
Document type: Journal article
Source: PHYSICAL REVIEW MATERIALS; v. 3, n. 11 NOV 4 2019.
Web of Science Citations: 0
Abstract

In this work, rhodamine B-doped GPTS/TEOS-derived organic/silica monolithic xerogels were prepared by the predoping sol-gel process. Thermal lens method was applied to determine thermo-optical properties of the samples. Since the samples present a high optical absorption coefficient, the high absorption theoretical TL model was introduced. Thermal diffusivities, optical absorption coefficients, and fluorescence quantum yield values were determined for samples with different rhodamine B (RhB) concentrations, from 10(-5) to 10(-2) M. The dye-doped organic/silica xerogels present a high fluorescence quantum yield (up to 90%), maintaining the value over 50% until a concentration of similar to 1.6 mM. To the best of our knowledge, RhB-doped transparent monoliths with a high fluorescence quantum yield with the highest RhB concentration reported in a solid hybrid matrix were obtained. (AU)

FAPESP's process: 17/16392-6 - Non-linear Spectroscopy of Solids Doped with Rare Earth ions
Grantee:Vitor Santaella Zanuto
Support Opportunities: Scholarships in Brazil - Post-Doctoral