Figure 2.

(7,7) nanotube under 1.0 V/Å electric field. a top view of the nanotube; b Mulliken charge distribution of the upper side of the nanotube; c Mulliken charge distribution of the lower side of the nanotube; d LUMO; e HOMO. The arrows in (a), (d) and e indicate field direction

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