摘要
采用溶剂热法成功制备La(OH)_3和La(OH)_3:Eu^(3+)纳米材料,表征了样品的晶体结构、微观形貌、宏观磁性及发光特性。结果表明,所制备样品是微观尺寸均匀,分散性良好,直径约为14 nm、长度约为107 nm的一维线状结构。纯La(OH)_3和La(OH)_3:Eu^(3+)纳米线均表现出室温铁磁性能,且其饱和磁化强度和荧光发射随掺杂浓度的提高先升高后降低。Eu^(3+)掺杂浓度为3%时,所制备的La(OH)_3:Eu^(3+)纳米线的饱和磁化强度最高(43.1 memu/g),是纯La(OH)_3纳米线(2.04 memu/g)的22倍。该掺杂浓度的样品同时表现出了优异的荧光发射性能,在589 nm,616 nm和696 nm处具有Eu^(3+)的特征荧光发射谱线。此类材料在特殊纳米功能器件、磁性荧光靶向药物等方面具有潜在的应用价值。
La(OH)3 and Eu 3+-doped La(OH)3 nanostructures were succesfully fabricated through solvothermal method.Their crystalline structure,morphologies,magnetic and fluorescence properties were characterized.All the samples have uniform size and are well-dispersed,which show wire-like shape with diameter of about 14 nm and length of about 107 nm.Magnetic properties show that both the La(OH)3 and Eu 3+doped La(OH)3 nanowires show ferromagnetic characteristic at room temperature.By increasing the concentration of Eu 3+ dopant,the saturation magnetization values and fluorescence properties of Eu 3+doped La(OH)3 nanowires increase first,and then decrease.When the concentration of Eu 3+dopant is 3%,the La(OH)3:3%Eu 3+nanowires have the highest saturation magnetization value of 43.1 memu/g,which is about 22 times larger than that of pure La(OH)3 nanowires(2.04 memu/g).Besides,the La(OH)3:3%Eu 3+nanowires show the highest fluorescence performance,which have several emission peaks at 589nm,616nm and 696 nm,corresponding to the characterized emission peaks of Eu 3+.These results suggest that the Eu 3+doped La(OH)3 nanowires have a great potential application in fields of special magnetic-optical nanodevices,magnetism-fluorescence-targeted medicine and so on.
作者
宗妍
汪亚靖
赵晨静
ZONG Yan;WANG Yajing;ZHAO Chenjing(School of Physics,Northwest University,Xi′an 710127,China)
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第1期31-36,共6页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学青年基金资助项目(11504293)
关键词
氢氧化镧
纳米线
Eu3+掺杂
磁性
发光性能
La(OH)3
nanowires
Eu 3+doping
magnetic properties
fluorescence properties
