The Deformations of Carbon Nanotubes under Cutting

被引:23
作者
Deng, Jue [1 ,2 ]
Wang, Chao [1 ,2 ]
Guan, Guozhen [1 ,2 ]
Wu, Hao [3 ,4 ,5 ]
Sun, Hong [3 ,4 ,5 ]
Qiu, Longbin [1 ,2 ]
Chen, Peining [1 ,2 ]
Pan, Zhiyong [1 ,2 ]
Sun, Hao [1 ,2 ]
Zhang, Bo [1 ,2 ]
Che, Renchao [1 ,2 ]
Peng, Huisheng [1 ,2 ]
机构
[1] Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China
[2] Fudan Univ, Lab Adv Mat, Shanghai 200438, Peoples R China
[3] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, Minist Educ, Key Lab Artificial Struct & Quantum Control, Shanghai 200240, Peoples R China
[5] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
关键词
carbon nanotube; structural deformation; shear; anisotropy; GRAPHENE; STRENGTH;
D O I
10.1021/acsnano.7b04130
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The determination of structural evolution at the atomic level is essential to understanding the intrinsic physics and chemistries of nanomaterials. Mechanochemistry represents a promising method to trace structural evolution, but conventional mechanical tension generates random breaking points, which makes it unavailable for effective analysis. It remains difficult to find an appropriate model to study shear deformations. Here, we synthesize high-modulus carbon nanotubes that can be cut precisely, and the structural evolution is efficiently investigated through a combination of geometry phase analysis and first-principles calculations. The lattice fluctuation depends on the anisotropy, chirality, curvature, and slicing rate. The strain distribution further reveals a plastic breaking mechanism for the conjugated carbon atoms under cutting. The resulting sliced carbon nanotubes with controllable sizes and open ends are promising for various applications, for example, as an anode material for lithium-ion batteries.
引用
收藏
页码:8464 / 8470
页数:7
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