Figure 4: Analysis of CNT morphology.
From: Strain-engineered manufacturing of freeform carbon nanotube microstructures
(a) SEM image of micropillar with catalyst on fine stripes of TiN, with close-up images showing the CNT morphology difference and evidence of internal stress causing local deformation. Scale bar, 100 μm (left), 2 μm (upper right) and 10 μm (lower right). (b) Close-up images of the aligned CNT morphology in adjacent segments of the micropillar. Scale bar, 500 nm. (c,d) SEM images of the substrate morphology after annealing in H2 and rapid cooling, showing hierarchical morphology of nanoparticles on the catalyst/TiN area. Scale bar, 500 nm. (e) Diameter mapping within the CNT forests, from fitting of SAXS data. Red—CNT of Fe/Al2O3, Green—CNT on Fe/Al2O3/TiN (40 nm), and Blue—CNT on Fe/Al2O3/TiN (80 nm).
