期刊
NANO LETTERS
卷 14, 期 7, 页码 4131-4137出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl501753n
关键词
Unzipping; carbon nanotubes; high impact; unzipping mechanism
类别
资金
- U.S. Department of Defense: U.S. Air Force Office of Scientific Research for the Project MUM: Synthesis and Characterization of 3-D Carbon Nanotube Solid Networks [FA9550-12-1-0035]
- CNPq
- CAPES
- FAPESP
- Center for Computational Engineering and Sciences at Unicamp through FAPESP/CEPID [2013/08293-7]
- IISc
The way nanostructures behave and mechanically respond to high impact collision is a topic of intrigue. For anisotropic nanostructures, such as carbon nanotubes, this response will be complicated based on the impact geometry. Here we report the result of hypervelocity impact of nanotubes against solid targets and show that impact produces a large number of defects in the nanotubes, as well as rapid atom evaporation, leading to their unzipping along the nanotube axis. Fully atomistic reactive molecular dynamics simulations are used to gain further insights of the pathways and deformation and fracture mechanisms of nanotubes under high energy mechanical impact. Carbon nanotubes have been unzipped into graphene nanoribbons before using chemical treatments but here the instability of nanotubes against formation, fracture, and unzipping is revealed purely through mechanical impact. defect
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