EFFECT OF PORE SIZE OF Fe/MESOPOROUS MOLECULAR SIEVE MATERIALS ON GROWTH OF CARBON NANOTUBULES

摘要

Carbon nanotube materials have wide-ranging implications to a variety of areas, such as chemistry, physics, electronics, optics, materials science, biomedical sciences, and so on. However, characterizations and applications of carbon nanotubules have been hampered because of their uncontrolled diameters and random growth directions. Recently, it has been reported that the growth directions can be controlled by catalytic synthesis of carbon nanotubules in the pores of Fe/silica substrate, resulting in aligned growth of the carbon nanotubules. However, control over the pore size distribution of gel silica is dificult and only rough substrate size selectivity can be anticipated. Thus support material with a fixed pore size that precisely controls the pore size and growth direcion of carbon nanotubes would be an advancement. Here we reported another method to tailor the diameters of carbon nanotubules by catalytic synthesizing carbon nanotubules using mesoporous molecular sieve materials with different one-dimensional pore sizes as supports.