Figure 2
From: Self-assembly of a parallelogram black phosphorus ribbon into a nanotube
Geometry of the system including a carbon nanotube (CNT) and a parallelogram BP nanoribbon. (a) Relative position between BP ribbon and CNT. (b) Four BP samples involved in experiments. S is the X-direction distance between the right edge of CNT and the upper left tip of BP ribbon. Distance between upper edges of CNT and BP ribbon d = ~1.524 nm. The axial length of CNT is ~8.68 nm. Within 0.5 nm of each hydrogenated end of CNT, the atoms are fixed in simulation. R is the radius of CNT, σ C-P (=~0.34 nm) is the surface distance between CNT and BP ribbon. L 0 (=~0.44 nm) and W 0 (=~0.33 nm) are the unit length of BP along armchair and zigzag direction, respectively. θ = 37.137°.
