Thermal conductivity of vertically aligned carbon nanotube arrays: Growth conditions and tube inhomogeneity

摘要: The thermal conductivity of vertically aligned carbon nanotube arrays (VACNTAs) grown on silicon dioxide substrates via chemical vapor deposition is measured using a 3ω technique. For each sample, the VACNTA layer and substrate are pressed to heating line at varying pressures extract sample's thermophysical properties. nanotubes' structure observed transmission electron microscopy Raman spectroscopy. presence hydrogen water in fabrication process tuned observe effect iron catalyst particles within individual nanotubes prevents array from achieving overall anticipated based reported measurements packing density.