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Xu R, Liu J, Cao H, Lin D, Chen X, Han F, Weng X, Wang Y, Liu L, Yu B, Qu J. In Vivo High-Contrast Biomedical Imaging in the Second Near-Infrared Window Using Ultrabright Rare-Earth Nanoparticles. NANO LETTERS 2023; 23:11203-11210. [PMID: 38088357 PMCID: PMC10723063 DOI: 10.1021/acs.nanolett.3c03698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/17/2023] [Accepted: 11/17/2023] [Indexed: 12/17/2023]
Abstract
Intravital luminescence imaging in the second near-infrared window (NIR-II) enables noninvasive deep-tissue imaging with high spatiotemporal resolution of live mammals because of the properties of suppressed light scattering and diminished autofluorescence in the long-wavelength region. Herein, we present the synthesis of a downconversion luminescence rare-earth nanocrystal with a core-shell-shell structure (NaYF4@NaYbF4:Er,Ce@NaYF4:Ca). The structure efficiently maximized the doping concentration of the sensitizers and increased Er3+ luminescence while preventing cross relaxation. Furthermore, Ce3+ doping in the middle layer efficiently limited the upconversion pathway and increased downconversion by 24-fold to produce bright 1550 nm luminescence under 975 nm excitation. Finally, optimizing the inert shell coating of NaYF4:Ca and liposome encapsulation reduced the luminescence quenching impact by water and improved biological metabolism. Thus, our synthesized biocompatible, ultrabright NIR-II probes provide high contrast and resolution for through-scalp and through-skull luminescence imaging of mice cerebral vasculature without craniotomy as well as imaging of mouse hindlimb microvessels.
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Affiliation(s)
- Rong Xu
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jiantao Liu
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Huiqun Cao
- College
of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Danying Lin
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xian Chen
- Shenzhen
Key Laboratory of New Information Display and Storage Materials, College
of Materials Science and Engineering, Shenzhen
University, Shenzhen 518060, China
| | - Fuhong Han
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xiaoyu Weng
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yiping Wang
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Liwei Liu
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Bin Yu
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Junle Qu
- Key
Laboratory of Optoelectronic Devices and Systems of Ministry of Education
and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
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