期刊
NANO LETTERS
卷 21, 期 11, 页码 4823-4829出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c01462
关键词
Monolayer amorphous carbon; Graphene; Roughening Toughness; Strength
类别
资金
- NSFC Basic Science Center for Multiscale Problems in Nonlinear Mechanics [11988102, 11790291]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22020200]
- CAS Center for Excellence in Complex System Mechanics
The study demonstrates that layered 3D MAC composites exhibit outstanding strength and plastic-like strain due to surface roughening and the ultra-compliant nature of MACs. Unlike using intact graphene or multiple stacked MACs, 3D MAC materials show superior mechanical properties.
Three-dimensional (3D) aggregation of graphene is dramatically weak and brittle due primarily to the prevailing interlayer van der Waals interaction. In this report, motivated by the recent success in synthesis of monolayer amorphous carbon (MAC) sheets, we demonstrate that outstanding strength and large plastic-like strain can be achieved in layered 3D MAC composites. Both surface roughening and the ultracompliant nature of MACs count for the high strength and gradual failure in 3D MAC. Such properties are not seen when intact graphene or multiple stacked MACs are used as building blocks for 3D composites. This work demonstrates a counterintuitive mechanism that surface roughening due to initial defects and low rigidity may help to realize superb mechanical properties in 3D aggregation of monolayer carbon.
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