Effects of substrate materials on growth of carbon nanotubes by chemical vapor deposition using metal-phthalocyanines

The growth of carbon nanotubes by chemical vapor deposition of metal-phthal ocyanine at 700 degrees C was examined using various substrate materials. I ntense growth was observed only at the micro-defects of Ni: Fe and stainles s steel foils and only at uneven sites, such as scratches and edges of Ta a nd W foils. Partial growth was recognized only on the rough surface of poro us Si. Nanotubes flaw densely on the oxidized surface of an Al plate, simil ar to the case of growth on a quartz plate. High-density growth was inferre d to be induced at sites with lower wetting for metal vapor.