Figure 5. Long and short diameters of a (10,10) SWNT as a function of applied hydrostatic pressure. The shape of the cross section at some selected pressures is plotted at the bottom of the figure. Reprinted from Reference [38].
From the same paper as the previous 2 imagtes. Shima’s Ref. No. 38: Sun, D.Y.; Shu, D.J.; Ji, M.; Liu, F.; Wang, M.; Gong, X.G. Pressure-induced hard-to-soft transition of a single carbon nanotube. Phys. Rev. B 2004, 70, 165417.