期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 5, 页码 1805-1811出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b11324
关键词
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资金
- National Natural Science Foundation of China [21274069, 51273105, 21334003, 21422403, 21674052, 51633003]
- State Specially Recruited Experts Program of the Government of China
- joint NSF-EPSRC grant RENEW [EP-K034308]
- Ministry of Science and Technology of China [2016YFA0202500]
- EPSRC [EP/K034308/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K034308/1] Funding Source: researchfish
Honeycomb structure endows graphene with extraordinary properties. But could a honeycomb monolayer superlattice also be generated via self-assembly of colloids or nanoparticles? Here we report the construction of mono- and multilayer molecular films with honeycomb structure that can be regarded as self-assembled artificial graphene (SAAG). We construct fan-shaped molecular building blocks by covalently connecting two kinds of clusters, one polyoxometalate and four polyhedral oligomeric silsesquioxanes. The precise shape control enables these complex molecules to self-assemble into a monolayer 2D honeycomb superlattice that mirrors that of graphene but on the mesoscale. The self-assembly of the SAAG was also reproduced via coarse-grained molecular simulations of a fan-shaped building block. It revealed a hierarchical key determining the honeycomb structure. Experimental images also show a diversity of bi- and trilayer stacking modes. The successful creation of SAAG and its stacks opens up prospects for the preparation of novel self-assembled nanomaterials with unique properties.
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