期刊
CHINESE PHYSICS LETTERS
卷 30, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0256-307X/30/3/038101
关键词
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资金
- National Natural Science Foundation of China [81071264, 81271622, 61071039]
- Project of Science and Technology of Guangdong Province [1012210400369, C010515]
- Project of Science and Technology of Guangzhou City [2010planD00011]
Gd2O3@SiO2 nanoparticles with a core-shell structure are synthesized by pulsed laser ablation in liquid (PLAL) in single steps. A Gd2O3 target immersed in tetraethyl orthosilicate (TEOS) is ablated by a microsecond Nd:YAG laser, which induces the generation of a Gd2O3 plasma plume and pyrolysis of the TEOS. We propose that the moment Gd2O3 nanoparticles are formed they will be coated immediately by SiO2 and directly synthesized Gd2O3@SiO2 core-shell nanoparticles. These particles obtain high r(1) relaxivity of 5.26 s(-1)mM(-1) and are used as T-1-weighted magnetic resonance imaging contrast agents. It is shown that the PLAL technique is promising for fabricating core-shell structure nanomaterial with potential medical applications.
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