Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA.
Nanotechnology. 2010 Mar 26;21(12):125604. doi: 10.1088/0957-4484/21/12/125604. Epub 2010 Mar 5.
CePO(4):Tb/LaPO(4) nanowires with a core/sheath architecture have been successful synthesized by a facile aqueous chemical method mediated by original CePO(4):Tb aggregation seeds. The seed crystals serve as both a luminescence center and a nucleation site for epitaxial growth. The seed nanocrystals have an irregular sphere-like shape with an average size of around 6.8 nm and a narrow size distribution. When the seed crystals are coated with LaPO(4), the resulting core/sheath CePO(4):Tb/LaPO(4) nanowires have mean diameters of about 7.6 nm and lengths up to 331 nm. Both photo- and x-ray luminescence demonstrate that the LaPO(4) coating increases the luminescence efficiency. These core/sheath structured nanowires may find potential applications in solid state lighting, medical imaging and radiation detection.
CePO(4):Tb/LaPO(4) 核壳纳米线通过一种简单的水相化学方法成功合成，该方法由原始的 CePO(4):Tb 聚集种子介导。这些种子晶体不仅作为发光中心，还作为外延生长的成核位点。种子纳米晶体呈不规则的球形，平均尺寸约为 6.8nm，尺寸分布较窄。当种子晶体被 LaPO(4) 包覆时，得到的核壳 CePO(4):Tb/LaPO(4) 纳米线的平均直径约为 7.6nm，长度可达 331nm。光致发光和 X 射线发光都表明，LaPO(4) 涂层提高了发光效率。这些核壳结构的纳米线在固态照明、医学成像和辐射探测方面可能有潜在的应用。
