272960.fig.001a
(a)
272960.fig.001b
(b)
272960.fig.001c
(c)
Figure 1: (a) Side profile SEM micrograph of the source MWCNTs. Inset: high-resolution SEM micrograph of the lower highlighted area demonstrating the extremely linear growth. (b) Areal SEM micrograph of the upper highlighted area in (a) illustrating the spaghetti-like morphology of the forest surface. Inset: HR-TEM micrograph showing four graphitic side walls. (c) Raman spectra (3 mW, 633 nm) of the as-grown MWCNTs. No distinguishable RBM peaks were observed (100-500 cm−1 wave numbers not shown), relative to the spectrometers noise floor, suggesting a largely multiwall population.