Orientations of overdamped magnetic nanorod-gyroscopes

Prajnaparamita Dhar, Cheryl D. Swayne, Thomas M. Fischer, Timothy Kline, Ayusman Sen

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Overdamped magnetic nanorod-gyroscopes driven by a rotating magnetic field undergo a series of reorientations when sedimenting on top of a surface in a viscous liquid. By changing the amplitude and the rotation frequency of the driving magnetic field, the nanorod-gyroscope either synchronizes or desynchronizes with the field and rotates either around its long or short axis. The different regimes of motion are explained theoretically by coupling the nanorod-gyroscopes motion to the creeping flow equations of the surrounding fluid. It is shown that friction anisotropy plays an important role for the orientation of the nanorod-gyroscopes.

Original languageEnglish (US)
Pages (from-to)1010-1012
Number of pages3
JournalNano letters
Volume7
Issue number4
DOIs
StatePublished - Apr 1 2007

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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