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Magnetophoretic Conductors and Diodes in a 3D Magnetic Field.

Publication ,  Journal Article
Abedini-Nassab, R; Joh, DY; Van Heest, M; Baker, C; Chilkoti, A; Murdoch, DM; Yellen, BB
Published in: Adv Funct Mater
June 14, 2016

We demonstrate magnetophoretic conductor tracks that can transport single magnetized beads and magnetically labeled single cells in a 3-dimensional time-varying magnetic field. The vertical field bias, in addition to the in-plane rotating field, has the advantage of reducing the attraction between particles, which inhibits the formation of particle clusters. However, the inclusion of a vertical field requires the re-design of magnetic track geometries which can transport magnetized objects across the substrate. Following insights from magnetic bubble technology, we found that successful magnetic conductor geometries defined in soft magnetic materials must be composed of alternating sections of positive and negative curvature. In addition to the previously studied magnetic tracks taken from the magnetic bubble literature, a drop-shape pattern was found to be even more adept at transporting small magnetic beads and single cells. Symmetric patterns are shown to achieve bi-directional conduction, whereas asymmetric patterns achieve unidirectional conduction. These designs represent the electrical circuit corollaries of the conductor and diode, respectively. Finally, we demonstrate biological applications in transporting single cells and in the size based separation of magnetic particles.

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Published In

Adv Funct Mater

DOI

ISSN

1616-301X

Publication Date

June 14, 2016

Volume

26

Issue

22

Start / End Page

4026 / 4034

Location

Germany

Related Subject Headings

  • Materials
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Abedini-Nassab, R., Joh, D. Y., Van Heest, M., Baker, C., Chilkoti, A., Murdoch, D. M., & Yellen, B. B. (2016). Magnetophoretic Conductors and Diodes in a 3D Magnetic Field. Adv Funct Mater, 26(22), 4026–4034. https://doi.org/10.1002/adfm.201503898
Abedini-Nassab, Roozbeh, Daniel Y. Joh, Melissa Van Heest, Cody Baker, Ashutosh Chilkoti, David M. Murdoch, and Benjamin B. Yellen. “Magnetophoretic Conductors and Diodes in a 3D Magnetic Field.Adv Funct Mater 26, no. 22 (June 14, 2016): 4026–34. https://doi.org/10.1002/adfm.201503898.
Abedini-Nassab R, Joh DY, Van Heest M, Baker C, Chilkoti A, Murdoch DM, et al. Magnetophoretic Conductors and Diodes in a 3D Magnetic Field. Adv Funct Mater. 2016 Jun 14;26(22):4026–34.
Abedini-Nassab, Roozbeh, et al. “Magnetophoretic Conductors and Diodes in a 3D Magnetic Field.Adv Funct Mater, vol. 26, no. 22, June 2016, pp. 4026–34. Pubmed, doi:10.1002/adfm.201503898.
Abedini-Nassab R, Joh DY, Van Heest M, Baker C, Chilkoti A, Murdoch DM, Yellen BB. Magnetophoretic Conductors and Diodes in a 3D Magnetic Field. Adv Funct Mater. 2016 Jun 14;26(22):4026–4034.
Journal cover image

Published In

Adv Funct Mater

DOI

ISSN

1616-301X

Publication Date

June 14, 2016

Volume

26

Issue

22

Start / End Page

4026 / 4034

Location

Germany

Related Subject Headings

  • Materials
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences