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Core/shell structured SiO2/Zn2SiO4:Mn2+ composite was prepared by thermal-diffusion reaction between SiO2 and Zn1−xMnxO particles, which is a low cost solid-state method. The X-ray diffraction and scanning electron microscope results showed that a 5-μm-thick dense Zn2SiO4:Mn2+ layer was successfully formed on the surface of the SiO2 particles. The PL spectrum of the SiO2/Zn2SiO4:Mn2+ composite revealed...
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