Rational design of Nd3+-sensitized multifunctional nanoparticles with highly dominant red emission

Xia Xu; Pengpeng Lei; Lile Dong; Xiuling Liu; Yue Su; Shuyan Song; Jing Feng; Hongjie Zhang

doi:10.1039/C6DT00707D

Rational design of Nd³⁺-sensitized multifunctional nanoparticles with highly dominant red emission†

Xia Xu,^ab Pengpeng Lei,^ab Lile Dong,^ab Xiuling Liu,^a Yue Su,^ab Shuyan Song,^a Jing Feng*^a and Hongjie Zhang*^a

* Corresponding authors

^a State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun 130022, China
E-mail: fengj@ciac.ac.cn, hongjie@ciac.ac.cn
Fax: +86-431-85698041
Tel: +86-431-85262127

^b University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

Controlling excitation and emission wavelengths on demand is very significant in bioimaging. Up-conversion nanoparticles (UCNPs) emit visible light upon near-infrared (NIR) light excitation and are well studied in bioimaging. Red emission is usually preferred to green due to its higher tissue penetration depth in bioimaging. Herein, dominant red emission has been achieved under 808 nm excitation based on the designed α-NaYbF₄:Mn²⁺/Er³⁺@NaLuF₄:Mn²⁺/Yb³⁺@NaNdF₄:Yb³⁺@NaGdF₄ (C@S1@S2@S3) nanostructure. The rationally designed interlayer shell NaLuF₄:Mn²⁺/Yb³⁺ could efficiently filter unwanted energy back-transfer from Er³⁺ to Nd³⁺ and the outmost shell NaGdF₄ could prevent excitation energy from surface-related quenching. The lifetime of ⁴F_9/2 → ⁴I_15/2 transition of Er³⁺ could be as high as 0.7 ms. Moreover, C@S1@S2@S3 UCNPs also possess effective contrast efficiency for both X-ray computed tomography (CT) and magnetic resonance (MR) imaging. The designed multifunctional UCNPs could be used as a potential multimodal bioprobe in bioimaging applications.

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DOI: https://doi.org/10.1039/C6DT00707D
Article type: Paper
Submitted: 23 Feb 2016
Accepted: 15 Apr 2016
First published: 15 Apr 2016

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Dalton Trans., 2016,45, 8440-8446

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Rational design of Nd³⁺-sensitized multifunctional nanoparticles with highly dominant red emission

X. Xu, P. Lei, L. Dong, X. Liu, Y. Su, S. Song, J. Feng and H. Zhang, Dalton Trans., 2016, 45, 8440 DOI: 10.1039/C6DT00707D

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Rational design of Nd³⁺-sensitized multifunctional nanoparticles with highly dominant red emission†

Abstract

Supplementary files

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Rational design of Nd³⁺-sensitized multifunctional nanoparticles with highly dominant red emission

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