Upconversion Emission and Paramagnetism of Colloid Ba2 ErF7 and Ba2 ErF7 :Yb^(3+) Nanocrystals Synthesized with Solvothermal Method  

作　　者：GONG Lunjun MA Mo XU Changfu LIN Jianguo YANG Qibin 

机构地区：[1]Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education,Xiangtan University [2]Institute of Modern Physics,Faculty of Materials,Optoelectronics and Physics,Xiangtan University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第6期1076-1081,共6页武汉理工大学学报（材料科学英文版）

摘　　要：Ultrasmall near-monodisperse Ba2ErF7 nanocrystals with average crystal size 9.6 nm were synthesized with solvothermal method. The X-ray diffraction （XRD） and transmission electron microscopy （TEM） assays reveal that the as-synthesized Ba2ErF7 nanocrystals are of the cubic structure with the cell parameter of 5.943 A, instead of the reported orthorhombic and tetragonal structure. Two emission bands originated from 2Hwj4H3/2 → 4F5/2 and 4F9/2 ----＋ 4115,2 of Er3＋ can be observed under a 980 nm laser excitation. The magnetic mass susceptibility of the as-synthesized BazErF7 nanocrystals reaches 4.293 × 10-5 emu g-1 Oe-1.Ultrasmall near-monodisperse Ba2ErF7 nanocrystals with average crystal size 9.6 nm were synthesized with solvothermal method. The X-ray diffraction （XRD） and transmission electron microscopy （TEM） assays reveal that the as-synthesized Ba2ErF7 nanocrystals are of the cubic structure with the cell parameter of 5.943 A, instead of the reported orthorhombic and tetragonal structure. Two emission bands originated from 2Hwj4H3/2 → 4F5/2 and 4F9/2 ----＋ 4115,2 of Er3＋ can be observed under a 980 nm laser excitation. The magnetic mass susceptibility of the as-synthesized BazErF7 nanocrystals reaches 4.293 × 10-5 emu g-1 Oe-1.

关 键 词：Ba2ErF7 nanocrystal UPCONVERSION PARAMAGNETISM 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O614.3[理学—无机化学]