核-壳结构的ZnS:Mn纳米粒子的荧光增强  

Optical Properties of Core-shell ZnS:Mn Nanoparticles

作　　者：曹立新[1] 黄世华[1] 任山令[1] 张家骅[1] 

机构地区：[1]中国科学院激发态物理开放实验室

出　　处：《光谱学与光谱分析》2003年第3期451-453,共3页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展规划 稀土功能材料的基础研究 (973 G1 9981 30 9)资助项目;国家自然科学基金 (1 980 4 0 1 1 ;0 1 72 0 4 7)资助项目

摘　　要：采用反胶束方法制备了ZnS :Mn纳米粒子并对其进行了ZnS壳层修饰 ,采用发射光谱和激发光谱对其光学性质进行了研究。与未包覆的ZnS:Mn纳米粒子相比 ,核 壳结构的ZnS :Mn纳米粒子来自于Mn2 + 离子的 5 80nm的发光增强了数倍 ,归因于ZnS壳增加了Mn2 + 离子到纳米颗粒表面的距离 ,减弱了Mn2 + 离子向表面猝灭中心的传递。样品制备后 ,核 壳结构的ZnS :Mn纳米粒子在 5 80nm的发光随时间略有增强 ,激发光谱的位置未发生明显变化 ,而未包覆的ZnS:Mn纳米粒子在 5 80nm的发光显著增强 ,同时自激活发光减弱 ,激发光谱明显发生红移 ,说明未包覆的ZnS :Mn纳米粒子的尺寸随时间增大 ,而核 壳结构的ZnS :Mn纳米粒子尺寸基本不变。Mn2+-doped ZnS nanoparticles were prepared in reverse micelles and were coated by a shell of ZnS. The optical properties of the coated Mn2+-doped ZnS nanoparticles were studied and compared with those of the uncoated ones. The results indicate that Mn2+ ions emission at 580 nm in the coated nanoparticles was much stronger than that in the uncoated ones. The excitation spectra of the uncoated nanoparticles shifted to the red with the time after the initial preparation, while those of the coated ones changed little, which indicate that the coated nanoparticles had better stability than the uncoated ones.

关 键 词：核-壳结构 ZNS:MN 纳米粒子 荧光增强 纳米发光材料 发光性能 

分 类 号：TN104.3[电子电信—物理电子学] TB383[一般工业技术—材料科学与工程]