(color online) Electronic transmission properties of armchair (5,0) and zigzag (3,3) BNTs. (a) Equilibrium transmission spectrum for (5,0) BNT, the inset illustrates the top view of (5,0) BNT. (b) Equilibrium transmission spectrum for (3,3) BNT, the inset illustrates the top view of (3,3) BNT. (c) Density of states for (5,0) BNT, the inset illustrates the transmission channel at the Fermi level with eigenvalues of 0.8772. (d) Density of states for (3,3) BNT, the inset illustrates the transmission channel at the Fermi level with eigenvalues of 0.9611. The Fermi level is set to zero.