Selective Janus Particle Assembly at Tipping Points of Thermally‐Switched Wetting |
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| Authors: | Changqian Yu Jie Zhang Prof Steve Granick |
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| Institution: | 1. Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801 (USA) http://groups.mrl.uiuc.edu/granick/;2. Department of Chemistry, and Department of Physics, Urbana, IL 61801 (USA) |
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| 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. |
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| Keywords: | Janus particle reconfigurable materials selective self‐assembly temperature triggers wetting |
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