Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 353, Issue 5-7, Pages 684-686Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2006.10.036
Keywords
defects; nanoparticles; luminescence; silica
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We propose a structural model of the blue-light-emitting center in silicon- and silica-based nanostructured materials on the basis of the dehydroxylation reaction of a pair of geminal silanol groups. This model predicts that the blue-light emission can be enhanced by introducing a large amount of surface silanol groups and the appropriate subsequent annealing. This enhancement of the PL emission is indeed observed in nanometer-sized amorphous silica particles with SiCl4. (c) 2007 Elsevier B.V. All rights reserved.
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