Organically modified silica compounds (ORMOSILs) were synthesized by a sol-gel method from amine-functionalized 3-aminopropyl triethoxylsilane and tetramethylorthosilicate and were doped in situ with LaF3:Ce nanoparticles, which in turn were prepared either in water or in ethanol. Doped ORMOSILs display strong photoluminescence either by UV or X-ray excitation and maintain good transparency up to a loading level of 15.66% w/w. The TEM observations demonstrate that ORMOSILs remain nanoporous with pore diameters in the 5-10 nm range. LaF3:Ce nanoparticles doped into the ORMOSILs are rod-like, 5 nm in diameter and 10-15 nm in length. Compression testing indicates that the nanocomposites have very good strength, without significant lateral dilatation and buckling under quasi-static compression. LaF3:Ce nanoparticle-doped ORMOSILs have potential for applications in radiation detection and solid state lighting.
M. Yao and R. Hall and W. Chen and D. Mohite and N. Leventis and N. Lu and J. Wang and M. J. Kim and H. Luo and H. Lu, "Luminescent LaF₃:Ce-doped Organically Modified Nanoporous Silica Xerogels," Journal of Applied Physics, vol. 113, American Institute of Physics (AIP), Jan 2013.
The definitive version is available at https://doi.org/10.1063/1.4773330
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© 2013 American Institute of Physics (AIP), All rights reserved.
01 Jan 2013