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Table 1 Diameter, bond length, and binding energy for different BNNTs

From: Tuning the electronic properties of boron nitride nanotube by mechanical uni-axial deformation: a DFT study

Nanotube and stoichiometry Tube diameter Bond length distribution (Å) Binding energy (eV/each atom)
   Type I Type II  
BNNT (4,4) 5.657 1.461 1.456 6.361
  5.49a 1.440b 1.444b  
BNNT (5,5) 7.043 1.457 1.455 6.422
  6.87a 1.439b 1.442b  
BNNT (6,6) 8.43 1.462 1.458 6.457
  8.23a 1.439b 1.440b  
BNNT (7,7) 9.49 1.462 1.459 6.476
  9.59a 1.438b 1.439b  
BNNT (8,8) 11.21 1.459 1.457 6.490
  10.95a 1.439b 1.439b  
BNNT (4,0) 3.556 1.499 1.439 6.187
  3.35a 1.476b 1.423b  
BNNT (5,0) 4.191 1.473 1.442 6.371
  4.08a 1.460b 1.429b  
BNNT (8,0) 6.263 1.460 1.454 6.606
  6.37a 1.445b 1.434b  
  1. aFrom Ref. [20]; bfrom Ref. [40].