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Cited by 408 publications
(233 citation statements)
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“…The prominent band at 420 nm was assigned to T 1 → S 0 defect fluorescence of twofold coordinated silicon (O-Si-O) present in a SiO 2 layer at the surface of the nanoparticles. This assignment is based on the similarity to the fluorescence of selected defect-rich SiO 2 [14,15,16], however, the excitation proceeds via a previously unreported state at 308 nm, presumably an interface exciton [9]. For excitation at 240 nm fluorescence emerges only from states lower that 275 nm, presumably the HOMO state of quantum confined Si, confirming our size estimation.…”
Section: Spectroscopy Imaging and Nanoparticle Sizesupporting
confidence: 61%
“…The prominent band at 420 nm was assigned to T 1 → S 0 defect fluorescence of twofold coordinated silicon (O-Si-O) present in a SiO 2 layer at the surface of the nanoparticles. This assignment is based on the similarity to the fluorescence of selected defect-rich SiO 2 [14,15,16], however, the excitation proceeds via a previously unreported state at 308 nm, presumably an interface exciton [9]. For excitation at 240 nm fluorescence emerges only from states lower that 275 nm, presumably the HOMO state of quantum confined Si, confirming our size estimation.…”
Section: Spectroscopy Imaging and Nanoparticle Sizesupporting
confidence: 61%
“…Also, Hu et al reported the similar green emission from SiO 2 nanowires synthesized by thermal oxidation [3]. Both blue and green light emissions in SiO x are known to be ascribed to neutral oxygen vacancies [1,9]. In the present study, high-temperature fabrication process can generate oxygen deficiencies, contributing to the observed emissions.…”
Section: Resultsmentioning
confidence: 54%
“…The characteristics of NBOHC and ODC have been investigated in the context of photoluminescence of silica glass [13][14][15][16][17][18][19]. Table I shows the peak energy (wave length) and the full width at half maximum (FWHM) of photoluminescence bands in bulk silica glass, which are related to NBOHC and ODC.…”
Section: Model Spectramentioning
confidence: 99%