Applied Physics Letters · 2005 · 21 citations · 22 references
Natural SciencesChemistryMaterials ScienceOptical MaterialsSurface ChemistrySurface ScienceLuminescent MaterialsNanostructured SurfacesPhotochemistrySurface AdsorptionSurface PhysicsThin Film Optical PropertiesDecay Curve AnalysisLuminescence LifetimeMonolayersPhotoinduced LuminescencePhotoluminescencePhotoluminescence SpectroscopySilicate ChemistrySurface Chemistry Of Silica
We have found that the adsorption of octadecyltrichlorosilane (OTS) monolayers on nanometer-sized silica particles yields a broad blue photoluminescence (PL) with a time scale of nanoseconds. The observed PL intensity increases after curing at temperatures from ∼100 to ∼300°C, suggesting that condensations between adjacent OTS molecules on the silica surface are related to the PL. The PL decay curve of the cured samples remains unchanged from 77 to 450 K, whereas the time-integrated PL intensity shows a monotonous decrease with increasing temperature. From these experimental results, a model of radiative and nonradiative process associated with the PL is presented.
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White Phosphors from a Silicate-Carboxylate Sol-Gel Precursor That Lack Metal Activator Ions
Will H. Green, Khoa P. Le, Jonathan Grey et al. · Science · 1997 · 321 citations