Figure 1.

Cross-sectional views of relaxed MWCNTs. From left to right on each row, the wall numbers are 5, 10, 15, 20, and 25. Top AC MWCNTs; middle ZG MWCNTs; bottom CH MWCNTs.

Huang et al. Nanoscale Res Lett 2011 6:53   doi:10.1007/s11671-010-9801-0