Efficient emission from core/(doped) shell nanoparticles: Applications for chemical sensing

被引：164

作者：

Thakar, Rahul ^{[1
]}

Chen, Yingchuan ^{[1
]}

Snee, Preston T. ^{[1
]}

机构：

[1] Univ Illinois, Dept Chem, Chicago, IL 60607 USA

来源：

NANO LETTERS | 2007年 / 7卷 / 11期

关键词：

D O I：

10.1021/nl0719168

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have studied manganese doping of zinc selenide core/zinc sulfide shell nanocrystals (NCs) where the impurity phosphor resides primarily in the shell. We have found that a simple two-step synthesis can be used to create these nontoxic materials that display efficient energy transfer from the core to the Mn doped shell. These core/shell NCs retain ample quantum efficiency (similar to 25%) when solubilized in water, which opens the possibility of using these materials as bioimaging agents. As recent work has shown that nanocrystals can be functionalized with organic dyes to operate as ratiometric chemical sensing agents, we have conjugated the doped NCs with an organic dye to showcase efficient Forster resonant energy transfer from the shell-doped phosphor to the surface-bound dye. This result indicates that doped NCs can be used to develop nontoxic ratiometric sensing/biological imaging agents.

引用

页码：3429 / 3432

页数：4

共 37 条

[1] Energy transfer from a semiconductor quantum dot to an organic matrix [J].