Coating optimization of superparamagnetic iron oxide nanoparticles for high T2 relaxivity.

Coating optimization of superparamagnetic iron oxide nanoparticles for high T2 relaxivity.
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DOI:
10.1021/nl102623x
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发表时间:
2010-11-10
期刊:
影响因子:
10.8
通讯作者:
Bao G
Bao G
中科院分区:
材料科学1区
文献类型:
--
作者:
Tong S;Hou S;Zheng Z;Zhou J;Bao G

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我们描述了一种新的包覆超顺磁性氧化铁纳米颗粒(SPIO)的方法,并证明了通过微调SPIO的核心尺寸和聚乙二醇涂层,每粒子的T2弛豫率可以增加200倍。采用14 nm晶核和聚乙二醇1000(PEG1000)包覆后,SPIO的T2驰豫系数可达385 S−1 mm−1,在已报道的所有SPIO中位居前列。体内肿瘤成像结果证实了SPIO的临床应用潜力。
We describe a new method for coating superparamagnetic iron oxide nanoparticles (SPIOs) and demonstrate that, by fine-tuning the core size and PEG coating of SPIOs, the T2 relaxivity per-particle can be increased by > 200 fold. With 14 nm core and PEG1000 coating, SPIOs can have T2 relaxivity of 385 s−1mM−1, which is among the highest of all SPIOs reported. In vivo tumor imaging results demonstrated the potential of the SPIOs for clinical applications.
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