Spiral diffusion of self-assembled dimers of Janus spheres

John G. Gibbs, Amir Nourhani, Joel N. Johnson, Paul Edward Lammert

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Janus spheres, micron-sized silica spheres half-coated with platinum, move rectilinearly away from the platinum side in aqueous hydrogen peroxide. Upon self-assembling, these colloidal particles can form dimers with different conformations that exhibit both rectilinear and rotational modes of motion depending upon the relative orientation of each Janus sphere. At the micron length-scale, stochastic rotational Brownian dynamics is of the order of deterministic dynamics, and their coupling results in effective diffusion, in addition to passive translational diffusion. For dimers with rotary motion, the dynamic coupling leads to spiral trajectories for an ensemble average of the displacement vector.

Original languageEnglish (US)
Pages (from-to)3471-3478
Number of pages8
JournalMRS Advances
Volume2
Issue number57
DOIs
StatePublished - Jan 1 2017

Fingerprint

Janus
Dimers
dimers
Platinum
platinum
assembling
hydrogen peroxide
Hydrogen peroxide
Silicon Dioxide
Hydrogen Peroxide
Conformations
Silica
Trajectories
trajectories
silicon dioxide

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Gibbs, John G. ; Nourhani, Amir ; Johnson, Joel N. ; Lammert, Paul Edward. / Spiral diffusion of self-assembled dimers of Janus spheres. In: MRS Advances. 2017 ; Vol. 2, No. 57. pp. 3471-3478.
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Spiral diffusion of self-assembled dimers of Janus spheres. / Gibbs, John G.; Nourhani, Amir; Johnson, Joel N.; Lammert, Paul Edward.

In: MRS Advances, Vol. 2, No. 57, 01.01.2017, p. 3471-3478.

Research output: Contribution to journalArticle

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