Carbon nanotubes Chemical vapor deposition Agglomeration Aligned nanotubes Alternating electric field Array densities Carbon fiber reinforced composites Catalyst material Catalysts Chemical vapour deposition Commercial nanoparticles Electric fields Fiber/matrix bond In-situ synthesis Iron oxide Iron oxide nanoparticle Iron oxides Magnetite Magnetite nanoparticles Multiwalled carbon nanotubes (MWCN) Nano-materials Nanomaterials Nanoparticle concentrations Nanoparticles Nanostructured materials Nanotube growth New approaches Scanning electron microscopy Silicon substrates Synthesis