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- Title
Photoswitchable Dissipative Two‐Dimensional Colloidal Crystals.
- Authors
Vialetto, Jacopo; Anyfantakis, Manos; Rudiuk, Sergii; Morel, Mathieu; Baigl, Damien
- Abstract
Control over particle interactions and organization at fluid interfaces is of great importance both for fundamental studies and practical applications. Rendering these systems stimulus‐responsive is thus a desired challenge both for investigating dynamic phenomena and realizing reconfigurable materials. Here, we describe the first reversible photocontrol of two‐dimensional colloidal crystallization at the air/water interface, where millimeter‐sized assemblies of microparticles can be actuated through the dynamic adsorption/desorption behavior of a photosensitive surfactant added to the suspension. This allows us to dynamically switch the particle organization between a highly crystalline (under light) and a disordered (in the dark) phase with a fast response time (crystallization in ≈10 s, disassembly in ≈1 min). These results evidence a new kind of dissipative system where the crystalline state can be maintained only upon energy supply.
- Subjects
COLLOIDAL crystals; COLLOIDS; DESORPTION; SURFACE active agents; POWER resources
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 27, p9243
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201904093