NDLI: Anisotropic Thermal Diffusivity of Aligned Multiwalled Carbon Nanotube Arrays

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Borca-Tasciuc, Theodorian Claudiu, L. Hapenciuc Wei, Bingqing Vajtai, Robert Pulickel, M. Ajayan
Copyright Year	2002
Abstract	This work employs a photothermoelectric technique to measure the anisotropic thermal diffusivity of an aligned multiwalled carbon nanotube array. A modulated laser beam incident to the front surface of the sample creates a thermal wave which is detected by a fast responding thermocouple formed between the back surface of the sample and the tip of a sharp metallic probe. The anisotropic thermal diffusivity values are obtained by fitting the radial and frequency dependent thermal signals with an anisotropic heat conduction model. The room temperature thermal diffusivity measured perpendicular to the alignment direction is 0.246×10−5m2/s, an order of magnitude smaller than thermal diffusivity along the CNTs alignment direction 4.4×10−5m2/s. However, the thermal diffusivity of the aligned multiwalled CNT is two orders of magnitude smaller than expected for an individual multiwalled CNT.
Sponsorship	Heat Transfer Division
Starting Page	305
Ending Page	309
Page Count	5
File Format	PDF
ISBN	0791836363
DOI	10.1115/IMECE2002-39576
Volume Number	Heat Transfer, Volume 5
Conference Proceedings	ASME 2002 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2002-11-17
Publisher Place	New Orleans, Louisiana, USA
Access Restriction	Subscribed
Subject Keyword	Heat conduction Fittings Temperature Anisotropy Thermocouples Carbon nanotubes Thermal diffusivity Signals Multi-walled carbon nanotubes Laser beams Probes Waves
Content Type	Text
Resource Type	Article

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