Dynamically-tunable colloidal band-pass and band-gap filters


Journal Article

We theoretically study particle motion on a periodic array of positive and negative magnetization domains having non-equal widths driven by a multi-frequency magnetic field input signal. Colloidal particles move across the substrate with positive, zero, or negative time-averaged velocity depending on the frequency ratio, the phase difference, and the ratio of the external field strength to the substrate magnetization. Simulations show that particles of a certain size range can either be transported or locally trapped, thereby providing a mechanism for implementing tunable colloidal band-pass and colloidal band-gap filters. © 2014 AIP Publishing LLC.

Full Text

Duke Authors

Cited Authors

  • Tahir, MA; Nori, F; Yellen, BB

Published Date

  • April 7, 2014

Published In

Volume / Issue

  • 115 / 13

Electronic International Standard Serial Number (EISSN)

  • 1089-7550

International Standard Serial Number (ISSN)

  • 0021-8979

Digital Object Identifier (DOI)

  • 10.1063/1.4870041

Citation Source

  • Scopus