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

被引：16

作者：

Bauer, Matthew L. ^{[1
]}

Pham, Quang N. ^{[1
]}

Saltonstall, Christopher B. ^{[1
]}

Norris, Pamela M. ^{[1
]}

机构：

[1] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 15期

基金：

美国国家科学基金会;

关键词：

DIAMETER; DENSITY;

D O I：

10.1063/1.4898708

中图分类号：

O59 [应用物理学];

学科分类号：

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 3 omega 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. (C) 2014 AIP Publishing LLC.

引用

页数：4

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