Site-specific growth of polymers on silica rods

Bo Peng*, Giuseppe Soligno, Marlous Kamp, Bart de Nijs, Joost de Graaf, Marjolein Dijkstra, Rene van Roij, Alfons van Blaaderen, Arnout Imhof

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Colloids specifically developed for self-assembly (SA) into advanced functional materials have rapidly become more complex, as this complexity allows for more ways to optimize both the SA process and the properties of the resulting materials. For instance, by creating 'patchy' particles more open structures can be achieved through directional interactions. However, the number of ways in which site-specific chemistry can be achieved on particle surfaces is still limited. Here, we show how polymer patches can be specifically grown onto only the flat end of bullet-shaped silica rods by utilizing a subtle anisotropy in surface tension and shape caused by the growth mechanism of the rods. Conversely, if the bullet-shaped silica rods are used as 'Pickering-emulsion' stabilizers the same surface tension effects exclusively direct the orientation of the rods into a 'hedgehog-morphology'. Finally, we demonstrate how an external electric field can direct the particles in a 'vectorial' way.

Original languageEnglish
Pages (from-to)9644-9650
Number of pages7
JournalSoft Matter
Volume10
Issue number48
DOIs
Publication statusPublished - 13 Oct 2014

Keywords / Materials (for Non-textual outputs)

  • JANUS PARTICLES
  • COLLOIDAL CLUSTERS
  • FACILE SYNTHESIS
  • FABRICATION
  • SURFACES
  • NANOCRYSTALS
  • INTERFACES
  • EMULSIONS
  • SHELLS
  • ROUTE

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