Selective janus particle assembly at tipping points of thermally-switched wetting

Changqian Yu, Jie Zhang, Steve Granick

Research output: Contribution to journalArticle

Abstract

Thermal wetting can simply, selectively and reversibly join patchy particles into clusters (2D and 3D) and also colloidal crystals over the narrow temperature range of 1-2 C. This is demonstrated with Janus particles (gold half-coated silica spheres) immersed in a binary mixture of water/2,6-lutidine, such that the relative strength of gold-gold bonding through hydrophobic interaction and silica-silica bonding through the wetting-induced attraction is reversibly switched according to temperature. Thermal wetting reversibly joins patchy colloidal particles into clusters and crystals. This is demonstrated with Janus particles made of gold (A) half-coated silica (B) spheres immersed in a mixture of water and 2,6-lutidine such that the relative strength of gold-gold bonding through hydrophobic interaction and silica-silica bonding through wetting-induced attraction is reversibly switched by temperature changes of only 1-2 C.

Original languageEnglish (US)
Pages (from-to)4364-4367
Number of pages4
JournalAngewandte Chemie - International Edition
Volume53
Issue number17
DOIs
StatePublished - Apr 22 2014

Keywords

  • Janus particle
  • reconfigurable materials
  • selective self-assembly
  • temperature triggers
  • wetting

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

Fingerprint Dive into the research topics of 'Selective janus particle assembly at tipping points of thermally-switched wetting'. Together they form a unique fingerprint.

  • Cite this