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Abstract
Developing novel one-dimensional (1-D) luminescent nanostructures (e.g., nanowires and nanoribbons) is highly desired for continuous progress in nanophotonics and other emerging optical technologies. Previous studies on 1-D luminescent nanostructures were mostly focused on semiconductor materials whose light emissions are originated from the radiative recombination of electrons and holes via either intrinsic states or extrinsic defect states. In this work, we have developed two series of Eu2+-activated alkaline-earth aluminate luminescent 1-D nanostructures (including nanoribbons and nanowires) that have localized Eu2+ luminescent centers and exhibit new compositions, new crystal structures, and new luminescence properties and mechanisms. We first synthesized three kinds of quaternary Eu2+-activated strontium europium aluminate nanoribbons and nanowires/whiskers through a carbothermal reaction and vapor-phase deposition method. The three strontium europium aluminates are: blue luminescent Sr1-xEuxAl6O10 (0
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