Defect-Induced Photoluminescence of Powdered Silica Glass

Paulo S. Pizani; M.R. Joya; F.M. Pontes; L.P.S. Santos; M. Godinho Jr; E.R. Leite; Elson Longo

doi:10.4028/www.scientific.net/DDF.273-276.479

Paper Titles

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Interfacial Reactions during the Dissolution of Titanium in Liquid Iron
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Parametric Analyses of the TROI Experimental Results by Using the TEXAS-V Code
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Defect-Induced Photoluminescence of Powdered Silica Glass
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Mass Transfer Kinetics in the Desulphurisation of Pig Iron with CaO and CaC₂
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Kinetic Description of the Mass Transfer in Ladle Metallurgy Operations
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Estimation of the Rate of Hydrogen Penetration in a Welded API 5L Steel Pipe
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Mössbauer Spectroscopy Studies of Grain Boundaries in Nanostructured Metals
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Defect-Induced Photoluminescence of Powdered Silica Glass

Abstract:

Visible photoluminescence was generated in standard soda-lime-silica glass powder, mechanically milled in a high-energy attrition mill. The broad emission band maximum shows a linear dependence on the exciting wavelength, suggesting the possibility to tune the PL emission. The photoluminescence was attributed to defect generation related to unsatisfied chemical bonds due to the high surface area. Raman scattering and ultraviolet-visible optical reflectance measurements corroborate this assertion. Transmission electron microscopy measurements indicate that the powder is composed by nanocrystallites with about 10-20 nanometers immersed in an amorphous media.