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Issue 24, 2018
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A super-stretchable boron nanoribbon network

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We have studied the mechanical properties of a two-dimensional (2D) boron nanoribbon network (BNRN) subjected to a uniaxial or a biaxial tensile strain using first principles calculations. The results show that the 2D BNRN is super-stretchable. The critical tensile strains of the BNRN in the χ-h1 phase along the a- and b-directions are 0.51 and 0.41, respectively, and that for the biaxial strain reaches an ultrahigh value of 0.84. By analyzing the B–B interatomic distance, coordination number and charge distribution, it is found that with increasing biaxial tensile strain, the χ-h1 BNRN undergoes two structural phase transitions, which are characterized by breaking of the B–B bonds and the partial transformation of the nanoribbon-like structures into chain-like structures. The strain-induced phase transitions significantly reduce the strain energy. We also discuss the elastic constants, Young's modulus, shear modulus, and Poisson's ratios. The super-stretchable and flexible mechanical properties of the BNRNs, together with their superior transport properties, make BNRNs useful in a wide range of applications in nanoscale electronic devices.

Graphical abstract: A super-stretchable boron nanoribbon network

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Publication details

The article was received on 10 Apr 2018, accepted on 08 May 2018 and first published on 08 May 2018

Article type: Paper
DOI: 10.1039/C8CP02257G
Citation: Phys. Chem. Chem. Phys., 2018,20, 16510-16517
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    A super-stretchable boron nanoribbon network

    Z. Wang, H. Cheng, T. Lü, H. Wang, Y. P. Feng and J. Zheng, Phys. Chem. Chem. Phys., 2018, 20, 16510
    DOI: 10.1039/C8CP02257G

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