Artículos de revistas
Tunable visible photoluminescence of powdered silica glass
Fecha
2008-01-15Registro en:
Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 354, n. 2-9, p. 476-479, 2008.
0022-3093
10.1016/j.jnoncrysol.2007.07.053
WOS:000252860800070
1159480346990821
0000-0001-6086-5303
Autor
Universidade Federal de São Carlos (UFSCar)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
intense photoluminescence in the visible region was observed at room temperature in standard soda-lime-silica glass powder, mechanically milled in a high-energy attrition mill. The emission band maximum shows an interesting dependence on the exciting wavelength, suggesting the possibility to tune the PL emission. These findings indicate that the photoluminescence may be directly related to unsatisfied chemical bonds correlated with the high surface area. The Raman scattering and ultraviolet-visible optical reflectance measurements corroborate this assertion. Transmission electron microscopy measurements indicate that samples milled more than 10 h present the formation of nanocrystallites with about 10-20 nm. (C) 2007 Elsevier B.V. All rights reserved.