Separation of Nanoparticles in Aqueous Multiphase Systems through Centrifugation
Separation of Nanoparticles in Aqueous Multiphase Systems through Centrifugation
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DOI：
10.1021/nl301452x
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发表时间：
2012-08-01
期刊：
影响因子：
10.8
通讯作者：
Whitesides, George M.
中科院分区：
文献类型：
--
作者：
Akbulut, Ozge;Mace, Charles R.;Whitesides, George M.
本文介绍了利用多水相系统(MUPS)作为速率分区离心法分离不同形状和尺寸的纳米颗粒的方法。MUPS的性质不随时间或在离心过程中改变；这种稳定性便于分离后的样品收集。一个三相系统演示了金纳米棒合成的反应产物(纳米棒、纳米球和大颗粒)的分离，并使用台式离心机在不到10分钟的时间内将纳米棒从48%浓缩到99%。
This paper demonstrates the use of aqueous multiphase systems (MuPSs) as media for rate-zonal centrifugation to separate nanoparticles of different shapes and sizes. The properties of MuPSs do not change with time or during centrifugation; this stability facilitates sample collection after separation. A three-phase system demonstrates the separation of the reaction products (nanorods, nanospheres, and large particles) of a synthesis of gold nanorods, and enriches the nanorods from 48 to 99% in less than ten minutes using a benchtop centrifuge.