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Super-stretchable boron nanoribbon network


We have studied the mechanical properties of 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 BNRN in the -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 the increasing biaxial tensile strain, -h1 BNRN undergoes two structural phase transitions which are characterized by breaking of B-B bonds and 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 BNRNs, together their superior transport properties, makes BNRNs useful in a vast applications in nanoscale electronic devices.

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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, Accepted Manuscript
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    Super-stretchable boron nanoribbon network

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

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