Trapping of Spherical and Elongated Magnetic Particles in Microfluidic Systems

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    Abstract

    Magnetic manipulation of particles in microfluidic systems has been applied only recently. Magnetic forces can be used for transport, positioning, separation and sorting of magnetic particles and magnetically tagged cells and eg proteins. Most commonly magnetic nanoparticles in microfluidics serve as a surface for bio- or
    immunoassays, which can therefore be done in a small volume and very localised [1]. In this study magnetic trapping of commonly used spherical super paramagnetic particles (Endorem®) and elongated nanoparticles, Fe filled multi walled carbon nanotubes (Fe-MWNTs) is studied. Suspensions of both types of particles are in a
    microfluidic chip and trapping is achieved by the use of a magnetic needle with a high gradient magnetic field (7500 T/m). Although the mass magnetization of the SPIO particles is a factor five higher compared to the Fe-MWNTs (figure 1) due to the low filling grade of the nanotubes trapping is still possible (figure 2). Furthermore
    Fe-MWNTs have potential in lab-on-a-chip-devices thanks to there large surface area for binding of proteins etc.
    Original languageEnglish
    Number of pages1
    Publication statusPublished - 25 May 2010
    Event8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers 2010
    - Rostock, Germany
    Duration: 25 May 201029 May 2010

    Conference

    Conference8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers 2010
    Country/TerritoryGermany
    CityRostock
    Period25/05/1029/05/10

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