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 language | English (US) |
|---|---|
| Pages (from-to) | 4364-4367 |
| Number of pages | 4 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 53 |
| Issue number | 17 |
| DOIs | |
| State | Published - Apr 22 2014 |
| Externally published | Yes |
Keywords
- Janus particle
- reconfigurable materials
- selective self-assembly
- temperature triggers
- wetting
ASJC Scopus subject areas
- General Chemistry
- Catalysis