期刊
NANO LETTERS
卷 16, 期 2, 页码 1445-1449出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b05049
关键词
Self-assembly; two-dimensional materials; molecular clusters; fullerene
类别
资金
- Center for Precision Assembly of Superstratic and Superatomic Solids, an NSF MRSEC [DMR-1420634]
- FAME
- MARCO
- DARPA
- NSF Graduate Research Fellowship [DGE 11-44155]
- Kwanjeong Educational Foundation
- Columbia University
Traditional atomic van der Waals materials such as graphene, hexagonal boron-nitride, and transition metal dichalcogenides have received widespread attention due to the wealth of unusual physical and chemical behaviors that arise when charges, spins, and vibrations are confined to a plane. Though not as widespread as their atomic counterparts, molecule-based two-dimensional (2D) layered solids offer significant benefits; their structural flexibility will enable the development Of materials with tunable properties. Here we describe a layered van der Waals solid self-assembled from a structure-directing building block and C-60 fullerene. The resulting crystalline solid contains a corrugated monolayer of neutral fullerenes and can be mechanically exfoliated. The absorption spectrum of the bulk solid shows an optical gap of 390 +/- 40 meV that is consistent with thermal activation energy obtained from electrical transport measurement. We find that the dimensional confinement of fullerenes significantly modulates the optical and electronic properties compared to the bulk solid.
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