Conformal coating of particles in microchannels by magnetic forcing

Scott S H Tsai, Jason S. Wexler, Jiandi Wan, Howard A. Stone

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


We present a co-flow microfluidic method to coat paramagnetic beads with a thin layer of fluid as the beads are pulled across a liquid-liquid interface by an external magnetic field. We show that the coating thickness can be controlled by the magnitude of the flow speed. Also, the number of beads aggregated within a single coating can be adjusted by varying the strength of the magnetic field or the liquid-liquid interfacial tension.

Original languageEnglish (US)
Article number153509
JournalApplied Physics Letters
Issue number15
StatePublished - Oct 10 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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