Efficient Dual-Modal NIR-to-NIR Emission of Rare Earth Ions Co-doped Nanocrystals for Biological Fluorescence Imaging

被引：87

作者：

Zhou, Jiajia ^{[1
,2
]}

Shirahata, Naoto ^{[2
,3
]}

Sun, Hong-Tao ^{[4
]}

Ghosh, Batu ^{[2
]}

Ogawara, Makoto ^{[5
,6
]}

Teng, Yu ^{[1
]}

Zhou, Shifeng ^{[1
]}

Chu, Rong Gui Sa ^{[7
]}

Fujii, Minoru ^{[7
]}

Qiu, Jianrong ^{[1
,8
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

[2] Natl Inst Mat Sci, World Premier Int Res Ctr Initiat Mat Nanoarchitr, Tsukuba, Ibaraki 3050044, Japan

[3] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

[4] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, Sapporo, Hokkaido 0608628, Japan

[5] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[6] Univ Tsukuba, Grad Sch Pure & Sci & Appl Sci, Tsukuba, Ibaraki 3058577, Japan

[7] Kobe Univ, Dept Elect & Elect Engn, Kobe, Hyogo 6578501, Japan

[8] S China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2013年 / 4卷 / 03期

基金：

中国国家自然科学基金;

关键词：

INFRARED UP-CONVERSION; ENERGY-TRANSFER; QUANTUM DOTS; IN-VITRO; CORE/SHELL NANOPARTICLES; VIVO; PHOTOLUMINESCENCE; FLUORIDE; LUMINESCENCE; SURFACE;

D O I：

10.1021/jz302122a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel approach has been developed for the realization of efficient near-infrared to near-infrared (NIR-to-NIR) upconversion and down-shifting emission in nanophosphors. The efficient dual-modal NIR-to-NIR emission is realized in a beta-NaGdF4/Nd3+@NaGdF4/Tm3+-Yb3+ core-shell nanocrystal by careful control of the identity and concentration of the doped rare earth (RE) ion species and by manipulation of the spatial distributions of these RE ions. The photoluminescence results reveal that the emission efficiency increases at least 2-fold when comparing the materials synthesized in this study with those synthesized through traditional approaches. Hence, these core-shell structured nanocrystals with novel excitation and emission behaviors enable us to obtain tissue fluorescence imaging by detecting the upconverted and down-shifted photoluminescence from Tm3+ and Nd3+ ions, respectively. The reported approach thus provides a new route for the realization of high-yield emission from RE ion doped nanocrystals, which could prove to be useful for the design of optical materials containing other optically active centers.

引用

页码：402 / 408

页数：7