Clusters of charged janus spheres

Hong Liang, Angelo Cacciuto, Erik Luijter, Steve Granick

Research output: Contribution to journalArticlepeer-review


We study the assembly of spherical particles with opposite electric charge on both hemispheres, in the case that the particle diameter exceeds the electrostatic screening length. Clusters result, not strings. The cluster shapes are analyzed by combined epifluorescence microscopy and Monte Carlo computer simulations with excellent agreement, indicating that the particles assemble in aqueous suspension to form equilibrated aggregates. The simulations show that charge asymmetry of individual Janus particles is preserved in the clusters.

Original languageEnglish (US)
Pages (from-to)2510-2514
Number of pages5
JournalNano letters
Issue number11
StatePublished - Nov 2006
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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