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Titolo: Time resolved ultraviolet photoluminescence of mesoporous silica
Autori: 
Data di pubblicazione: 2005
Rivista: 
JOURNAL OF PHYSICAL CHEMISTRY. B, CONDENSED MATTER, MATERIALS, SURFACES, INTERFACES & BIOPHYSICAL  
Abstract: We studied the optical properties of sol-gel synthesized porous silica excited by synchrotron radiation in the 4-10 eV range. The spectral and temporal characteristics of the ultraviolet photoluminescence at about 3.7 eV are reported. The UV emission results from the contribution of two different centers: the first one centered at 3.7 eV with a decay time of 2.0 ns and the second one peaked at 3.9 eV with a decay time of 20 ns. We propose to assign the observed luminescence to different interacting surface silanols.
Handle: http://hdl.handle.net/11584/97665
Tipologia:1.1 Articolo in rivista

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