Figure 5.

Dmaj/Dmin ratios of the nanotubes with different diameters. The 4 nanotubes in the figure have the same length. “EA” and “EB” in the legend indicate field directions. The insets show the structures of the deformed nanotubes with the largest Dmaj/Dmin ratio in each curve (viewing along the tube axis)

Kan et al. Nanoscale Research Letters 2010 5:1144-1149   doi:10.1007/s11671-010-9617-y