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Modulating Orientational Order to Organize Polyhedral Nanoparticles into Plastic Crystals and Uniform Metacrystals
Ist Teil von
Angewandte Chemie (International ed.), 2020-11, Vol.59 (47), p.21183-21189
Auflage
International ed. in English
Ort / Verlag
Weinheim: Wiley Subscription Services, Inc
Erscheinungsjahr
2020
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In nanoparticle self‐assembly, the current lack of strategy to modulate orientational order creates challenges in isolating large‐area plastic crystals. Here, we achieve two orientationally distinct supercrystals using one nanoparticle shape, including plastic crystals and uniform metacrystals. Our approach integrates multi‐faceted Archimedean polyhedra with molecular‐level surface polymeric interactions to tune nanoparticle orientational order during self‐assembly. Experiments and simulations show that coiled surface polymer chains limit interparticle interactions, creating various geometrical configurations among Archimedean polyhedra to form plastic crystals. In contrast, brush‐like polymer chains enable molecular interdigitation between neighboring particles, favoring consistent particle configurations and result in uniform metacrystals. Our strategy enhances supercrystal diversity for polyhedra comprising multiple nondegenerate facets.
Gaining control over the orientational order of nanoparticles, and by extension the formation of plastic crystals over large areas, remains challenging. Molecular‐level polymeric surface interactions are now employed to modulate the orientational order of Archimedean nanoparticles. Two orientationally distinct supercrystals are formed using a single nanoparticle shape, including plastic crystals and uniform metacrystals.