  Fe filled carbon nanotubes were synthesized by atmospheric pressure chemical
vapor deposition using a simple mixture of iron acetylacetonate with a
conventional photoresist and the effect of growth temperature from 550 to 950
{\deg}C on Fe filled nanotubes has been studied. Scanning electron microscopy
results show that, as the growth temperature increases from 550 to 950 {\deg}C,
the average diameter of the nanotubes increases while their number density
decreases. High resolution transmission electron microscopy along with energy
dispersive X-ray investigation shows that the nanotubes have a multi-walled
structure with partial Fe filling for all growth temperatures. The graphitic
nature of the nanotubes was observed via X-ray diffraction pattern. Raman
analysis demonstrates that the degree of graphitization of the carbon nanotubes
depends upon the growth temperature.
