Mechanistic Investigation of Photon Upconversion in Nd3+-Sensitized Core-Shell Nanoparticles

被引：673

作者：

Xie, Xiaoji ^{[1
]}

Gao, Nengyue ^{[1
]}

Deng, Renren ^{[1
]}

Sun, Qiang ^{[1
]}

Xu, Qing-Hua ^{[1
]}

Liu, Xiaogang ^{[1
,2
]}

机构：

[1] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

[2] Inst Mat Res & Engn, Singapore 117602, Singapore

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2013年 / 135卷 / 34期

关键词：

UPCONVERTING NANOPARTICLES; ENERGY MIGRATION; IN-VITRO; NANOCRYSTALS; LUMINESCENCE; EFFICIENT; EMISSION; STRATEGY; PHOTOLUMINESCENCE; EXCITATION;

D O I：

10.1021/ja4075002

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new type of core-shell upconversion nanoparticles which can be effectively excited at 795 nm has been designed and synthesized through spatially confined doping of neodymium (Nd3+) ions. The use of Nd3+ ions as sensitizers facilitates the energy transfer and photon upconversion of a series of lanthanide activators (Er3+, Tm3+, and Ho3+) at a biocompatible excitation wavelength (795 nm) and also significantly minimizes the overheating problem associated with conventional 980 nm excitation. Importantly, the core shell design enabled high-concentration doping of Nd3+ (similar to 20 mol %) in the shell layer and thus markedly enhanced the upconversion emission from the activators, providing highly attractive luminescent biomarkers for bioimaging without autofluorescence and concern of overheating.

引用

页码：12608 / 12611

页数：4