Conformal coating of particles in microchannels by magnetic forcing

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

doi:10.1063/1.3652772

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 journal › Article › peer-review

53 Scopus citations

Abstract

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 language	English (US)
Article number	153509
Journal	Applied Physics Letters
Volume	99
Issue number	15
DOIs	https://doi.org/10.1063/1.3652772
State	Published - Oct 10 2011

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3652772

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title = "Conformal coating of particles in microchannels by magnetic forcing",

abstract = "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.",

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AU - Wan, Jiandi

AU - Stone, Howard A.

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Y1 - 2011/10/10

N2 - 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.

AB - 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.

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Conformal coating of particles in microchannels by magnetic forcing

Abstract

All Science Journal Classification (ASJC) codes

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