Spiral diffusion of self-assembled dimers of Janus spheres

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

Research output: Contribution to journalArticle

5 Scopus citations

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

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Spiral diffusion of self-assembled dimers of Janus spheres'. Together they form a unique fingerprint.

  • Cite this