SEM images of selectively grown CNTs. (a) SEM image showing site-specific CNT growth. (b) Angled view of aligned CNTs showing the distinct edge of the pattern line. (c) Close-up view of the squared area in (b), showing the vertically aligned CNTs grown. (d) High-magnification SEM image showing the individual CNTs.
Na et al. Nanoscale Research Letters 2013 8:409 doi:10.1186/1556-276X-8-409