期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 18, 期 43, 页码 13642-13650出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201202336
关键词
binary acids; hydrothermal synthesis; immunoassays; luminescence; upconversion
资金
- NSFC [21101029, 21273041]
- Shanghai Rising-Star Program [12QA1400400]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF12001]
- Fudan Startup Foundation for Advanced Talents
- Key Subjects Innovative Talents Program of Fudan University
In this paper, we report a facile one-step hydrothermal method to synthesize phase-, size-, and shape-controlled carboxyl-functionalized rare-earth fluorescence upconversion phosphors by using a small-molecule binary acid, such as malonic acid, oxalic acid, succinic acid, or tartaric acid as capping agent. The crystals, from nano- to microstructures with diverse shapes that include nanospheres, microrods, hexagonal prisms, microtubes, microdisks, polygonal columns, and hexagonal tablets, can be obtained with different reaction times, reaction temperatures, molar ratios of capping agent to sodium hydroxide, and by varying the binary acids. Fourier transform infrared, thermogravimetric analysis, and upconversion luminescence spectra measurements indicate that the synthesized NaYF4:Yb/Er products with hydrophilic carboxyl-functionalized surface offer efficient upconversion luminescent performance. Furthermore, the antibody/secondary antibody conjugation can be realized by the carboxyl-functionalized surfaces of the upconversion phosphors, thus indicating the potential bioapplications of these kinds of materials.
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