5 years ago

The Deformations of Carbon Nanotubes under Cutting

The Deformations of Carbon Nanotubes under Cutting
Renchao Che, Zhiyong Pan, Peining Chen, Hao Wu, Bo Zhang, Hong Sun, Chao Wang, Longbin Qiu, Guozhen Guan, Huisheng Peng, Jue Deng, Hao Sun
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.

Publisher URL: http://dx.doi.org/10.1021/acsnano.7b04130

DOI: 10.1021/acsnano.7b04130

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