  Partially Fe filled multi-walled carbon nanotubes (MWCNTs) were grown by
chemical vapor deposition with propane at 850 {\deg}C using a simple mixture of
iron (III) acetylacetonate (Fe(acac)3) powder and conventional photoresist.
Scanning electron microscopy revealed that catalytic nanoparticles with an
average diameter of 70 nm are formed on the Si substrate which governs the
diameter of the MWCNTs. Transmission electron microscopy shows that the
nanotubes have a multi-walled structure with partial Fe filling. A
site-selective growth of partially Fe filled MWCNTs is achieved by a simple
photolithographic route.
