Microfluidic Assembly of Magnetic Hydrogel Particles with Uniformly Anisotropic Structure
Original entry: Darren Yang, AP225, Fall 2010
C.H. Chen, A.R. Abate, D. Lee, E.M. Terentjev, D.A. Weitz, “Editing Microfluidic Assembly of Magnetic Hydrogel Particles with Uniformly Anisotropic Structure,” Advanced Materials, 21, 3201–3204 (2009).
Drop and bubble formation; Magnetic fluids and ferrofluids; Microemulsions; Micro-and nano-scale flow phenomena
The authors present a method to produce monodisperse magnetic particles from double emulsions formed using sequential flow-focus drop formation. This microfluidic drop formation allows the particles to be formed with high monodispersity and with consistently anisotropic internal structure. This structural anisotropy gives rise to magnetic anisotropy, allowing the particles to be rotated by a magnetic field.