Magnetically tunable self-assembly of colloidal rings
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We present a technique using ferrofluid to induce bidisperse suspensions of superparamagnetic and diamagnetic beads to assemble into colloidal ring configurations. The separation distance between particles within the ring can be tuned by adjusting the ferrofluid concentration, which has the effect of enhancing the effective dipole moment of one of the components while screening the dipole moment of the other, leading to a wealth of different ring configurations. © 2010 American Institute of Physics.
Published Version (Please cite this version)10.1063/1.3483137
Publication InfoLi, KH; & Yellen, Benjamin (2010). Magnetically tunable self-assembly of colloidal rings. Applied Physics Letters, 97(8). pp. 83105. 10.1063/1.3483137. Retrieved from http://hdl.handle.net/10161/3358.
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Associate Professor in the Department of Mechanical Engineering and Materials Science
Yellen's group is interested in developing highly parallel mechanisms for controlling the transport and assembly of ensembles of objects ranging from micron-sized colloidal particles to single cells. As of 2013, Professor Yellen is active in two main areas of research:1) Development of single cell analysis tools using magnetic circuits. The goal of this project is to develop an automated single cell analysis platform that allows for highly flexible and highly paralle