Back to Search Start Over

Thermal Conductivity and Specific Heat Measurements of Single Nanowires

Thermal Conductivity and Specific Heat Measurements of Single Nanowires

Authors :
Chris Dames
Gang Chen
Source :
Heat Transfer: Volume 1.
Publication Year :
2005
Publisher :
ASMEDC, 2005.

Abstract

For the effective use of nanowires and nanotubes in their many possible applications in sensing, computation and memory, optoelectronics, and energy conversion, it is important to understand their thermal properties, which may differ considerably from bulk [1]. For example, there is good agreement between theory and experiments on Si nanowires showing that the classical size effect of phonon boundary scattering may reduce the thermal conductivity by up to several orders of magnitude for diameters of 40 nm and up [2, 3, 12, 13]. However, more experiments are needed at 20 nm and smaller diameters. There is also a need for experiments on the specific heat of single nanowires, which is intimately related to thermal conductivity by kinetic theory, and may be altered by quantum confinement effects. We have previously measured the specific heat of a pellet of TiO2 nanotubes of ∼3 nm wall thickness and found it similar to the bulk material at temperatures above ∼80 K [4]; however, questions remain about the possible interactions between adjacent tubes, which single-tube studies would resolve.Copyright © 2005 by ASME

Details

Database :
OpenAIRE
Journal :
Heat Transfer: Volume 1
Accession number :
edsair.doi...........e07b2d92cd062cd03ad800b4f7c16b47
Full Text :
https://doi.org/10.1115/ht2005-72780