通过水相法合成Eu3掺杂ZnS纳米晶(ZnS∶Eu),合成的ZnS:Eu纳米晶具有立方晶形结构,粒径约为2 nm～4 nm,荧光谱图中可以检测到Eu3+的5Do-7FJ(J=0,1,2)的特征吸收峰,这是由于在ZnS∶Eu纳米晶内Eu3+周围存在电荷缺陷和晶格缺陷导致的.为了实现ZnS∶Eu纳米晶的功能性和可加工性,通过新颖的方法配体交换法合成了5-(2-甲基丙烯酰乙氧基甲基)-8-羟基喹啉(MQ)表面修饰的ZnS∶Eu纳米晶(MQ-ZnS∶ Eu),表面修饰后的MQ-ZnS∶ Eu纳米晶与ZnS∶Eu纳米晶相比较发光效率显著提高,且发射峰发生蓝移,蓝移约80 nm～90 nm,这可能是MQ与ZnS∶Eu纳米晶之间协同作用导致的.
Eu3+ doping ZnS NCs were synthesized via an aqueous chemical route(ZnS∶Eu NCs),the ZnS∶Eu NCs,with a cubic crystal structure,had the diameter of 2 nm～ 4 nm.The characteristic luminescence from the 5Do-7FJ (J =0,1,2)transition of Eu 3 + was observed,this was attributed to the electrons and lattice distortion being localized around Eu3 +.To carry out the functionality and processability of the ZnS ∶ Eu NCs,MQ-ZnS ∶ Eu NCs were prepared from the ZnS∶ Eu NCs and 5-(2-methacryloylethyloxymethyl)-8-quinolinol (MQ) by a novel ligand exchange process.Fluorescence efficiency of MQZnS∶Eu NCs improved significantly and had a blue shift,comparing to the ZnS∶Eu NPs,shifted about 80 nm～ 90 nm,possibly because of the cooperative interaction between MQ and ZnS∶Eu NCs.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%