We investigated luminescence properties of submicron-sized silica particles prepared by Stöber method under different conditions. After annealing in a non-oxidizing atmosphere, the submicron-sized silica particles show a broad photoluminescence (PL) band at 500 nm ranging from visible to ultraviolet wavelength by excitation at 250 nm, and the one at 600 nm by excitation at 488 nm. The particle diameters were controlled by the ethanol contents or temperatures during synthesis. With decreasing particle diameters, the PL band appears by shorter annealing time. The PL was enhanced by the removal of impurities and subsequent formation of luminescent structures by the thermal annealing.
|出版ステータス||Published - 2005 10月 7|
|イベント||2005 International Symposium on Electrical Insulating Materials, ISEIM 2005 - Kitakyushu, Japan|
継続期間: 2005 6月 5 → 2005 6月 9
|Conference||2005 International Symposium on Electrical Insulating Materials, ISEIM 2005|
|Period||05/6/5 → 05/6/9|
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