期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 41, 页码 14644-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja906971y
关键词
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资金
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Canada Foundation for Innovation (CH)
- British Columbia Knowledge Development Fund (BCKDF)
Hexagonal-phase NaYF4/NaGdF4 core/shell nanocrystals were synthesized and investigated by X-ray photoelectron spectroscopy (XPS) using tunable synchrotron radiation. Based on the ratio of the Y3+ 3d to Gd3+ 4d core level intensities at varying photoelectron kinetic energies, we conclude that Gd3+ resides predominantly at the surface of the nanocrystals, proving a core/shell structure. These nanocrystals show potential for use as contrast agents in magnetic resonance imaging (MRI) applications and optical imaging.
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