利用单分散性良好的介孔SiO2纳米粒子为模板,选择Y2O3为基底,同时掺杂可见区红光发光中心Eu3+和近红外区发光中心Er3+(1.54 um),制备了特殊结构的核壳多功能发光纳米材料.光谱测试结果表明,这种核壳材料同时具有可见区发光和近红外发光的双重性质,表明Y2O3,可作为红光Eu和近红外发光Er的良好基底材料.该方法可以大大降低纳米发光材料中稀土元素的使用量,降低发光材料的成本,并且该核壳结构材料密度相对较低,易于分散在有机溶剂或者水中,在药物释放和多功能生物标记等方面具有潜在的应用价值.%We have utilized a homogeneous precipitation method to fabricate core-shell Y2O3: Er, Eu nanomaterials with colloidal mesoporous silica nanoparticles as templates followed by heat treatment at 800 ℃, and the luminescence properties of the as-synthesized nanomaterials have been investigated in detail. The core-shell nanoparticles exhibit properties of photoluminescence and near-infrared (NIR) luminescence. And Y2O3 is a promising host matrix for downconversion and NIR luminescence due to its good chemical, thermal stabilities and low phonon energy. The core-shell nanoparticles may have some advantages for potential applications in drug delivery or optical imaging.
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