Combining positive and negative magnetophoreses to separate particles of different magnetic properties
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- 作者：Taotao Zhu (1)
Rui Cheng (2)
Yufei Liu (3)
Jian He (3)
Leidong Mao (2) - 关键词：Separation ; Ferrofluid ; Microfluidics ; Magnetophoresis
- 刊名：Microfluidics and Nanofluidics
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：17
- 期：6
- 页码：973-982
- 全文大小：3,248 KB
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Rui Cheng (2)
Yufei Liu (3)
Jian He (3)
Leidong Mao (2)
1. Department of Chemistry, Nanoscale Science and Engineering Center, The University of Georgia, Athens, GA, 30602, USA
2. College of Engineering, Nanoscale Science and Engineering Center, The University of Georgia, Athens, GA, 30602, USA
3. Department of Physics and Astronomy, Clemson University, Clemson, SC, 29634, USA - ISSN：1613-4990
文摘
A new separation method that combines both positive and negative magnetophoreses based on ferrofluids is used to separate mixtures of particles with different magnetic properties. Ferrofluids are stable magnetic nanoparticles suspensions. Under external magnetic field gradients, particles with a larger magnetization within the ferrofluids are attracted to a magnet while the ones with a smaller magnetization are pushed away from it. Based on this principle, we report the design, modeling, fabrication, and characterization of the separation device and use it to separate magnetic and non-magnetic particles, as well as particles with different magnetizations. This scheme is simple, cost-effective, and label-free compared to other existing techniques.