Now showing items 1-7 of 7

    • An acoustofluidic trap and transfer approach for organizing a high density single cell array. 

      Kelly, Sean T; Lin, Kevin H; Motschman, Jeffrey D; Ohiri, Korine A; Wood, Kris Cameron; Yellen, Benjamin (Lab on a chip, 2018-06-22)
      We demonstrate a hybrid microfluidic system that combines fluidic trapping and acoustic switching to organize an array of single cells at high density. The fluidic trapping step is achieved by balancing the hydrodynamic ...
    • Characterizing the Switching Thresholds of Magnetophoretic Transistors. 

      Abedini-Nassab, R; Baker, C; Chilkoti, A; Garcia, JV; Joh, DY; Margolis, DM; Murdoch, DM; ... (11 authors) (Adv Mater, 2015-10-28)
      The switching thresholds of magnetophoretic transistors for sorting cells in microfluidic environments are characterized. The transistor operating conditions require short 20-30 mA pulses of electrical current. By demonstrating ...
    • Magnetically tunable self-assembly of colloidal rings 

      Li, KH; Yellen, Benjamin (Applied Physics Letters, 2010-08-23)
      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 ...
    • Magnetophoretic circuits for digital control of single particles and cells. 

      Abedini-Nassab, R; Hu, X; Jadhav, M; Kim, C; Kim, K; Lim, B; Lim, YT; ... (10 authors) (Nat Commun, 2014-05-14)
      The ability to manipulate small fluid droplets, colloidal particles and single cells with the precision and parallelization of modern-day computer hardware has profound applications for biochemical detection, gene sequencing, ...
    • Phase diagram and aggregation dynamics of a monolayer of paramagnetic colloids 

      Charbonneau, Patrick; Detwiler, Paige; Pham, AT; Socolar, Joshua ES; Yellen, Benjamin; Zhuang, Y (2017-06-01)
      We have developed a tunable colloidal system and a corresponding simulation model for studying the phase behavior of particles assembling under the influence of long-range magnetic interactions. A monolayer of paramagnetic ...
    • Phase transformations in binary colloidal monolayers. 

      Charbonneau, Patrick; Fu, L; Marcoux, C; Socolar, Joshua ES; Yang, Y; Yellen, Benjamin (Soft Matter, 2015-03-28)
      Phase transformations can be difficult to characterize at the microscopic level due to the inability to directly observe individual atomic motions. Model colloidal systems, by contrast, permit the direct observation of individual ...
    • The synchronization of superparamagnetic beads driven by a micro-magnetic ratchet. 

      Gao, L; Gottron, NJ; Virgin, LN; Yellen, Benjamin (Lab Chip, 2010-08-21)
      We present theoretical, numerical, and experimental analyses on the non-linear dynamic behavior of superparamagnetic beads exposed to a periodic array of micro-magnets and an external rotating field. The agreement between ...