Journal
CHEMISTRY OF MATERIALS
Volume 14, Issue 7, Pages 2849-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm0211599
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Rare-earth-doped SiO2 colloids can be grown in a wet chemical procedure by adding the appropriate rare earth chloride to a solution of tetraethoxysilane, glacial acetic acid, and water. The size polydispersity of the particles can be controlled in a seeded growth process, and monodisperse Er3+-doped particles were grown by covering 183-nm-diameter seed particles with a 5-6-nm-thick (Er-doped) shell. After annealing, typical Er luminescence is observed with long luminescence lifetimes.
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