Thermal conductivity of vertically aligned carbon nanotube arrays: Growth conditions and tube inhomogeneity
Abstract
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 a heating line at varying pressures to extract the sample's thermophysical properties. The nanotubes' structure is observed via transmission electron microscopy and Raman spectroscopy. The presence of hydrogen and water vapor in the fabrication process is tuned to observe the effect on measured thermal properties. The presence of iron catalyst particles within the individual nanotubes prevents the array from achieving the overall thermal conductivity anticipated based on reported measurements of individual nanotubes and the packing density.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 13, 2014
- Source ID
- 10.1063/1.4898708
Entities
People
- Christopher B. Saltonstall
- Matthew L. Bauer
- Pamela M. Norris
- Quang N. Pham
Organizations
- National Science Foundation
- Office of Naval Research
- University of Virginia