Figure 5.

TEM images of AAO-based 50 nm MWCNTs after the first- and second-step pyrolysis of C2H4: (a) AM50, (b) ATM50, (c) and (d) fine view of ATM50. ([85], Copyright @ American Chemical Society)

Pan et al. Nanoscale Research Letters 2010 5:654-668   doi:10.1007/s11671-009-9508-2