Abo Bibliothek: Guest
International Heat Transfer Conference 13
Graham de Vahl Davis (open in a new tab) School of Mechanical and Manufacturing Engineering, University of New South Wales, Kensington, NSW, Australia
Eddie Leonardi (open in a new tab) Computational Fluid Dynamics Research Laboratory, School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia 2052

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

STUDIES ON THERMOPHYSICAL PROPERTIES OF NANOSTRUCTURED MATERIALS

page 20
DOI: 10.1615/IHTC13.p30.310
Get accessGet access

ABSTRAKT

The thermophysical properties of nanostructured materials are of importance for basic science as well as for technological applications. In this paper, we, at first, summarize the progress in the studies on the thermophysical properties of nanostructured materials, especially on the thermal conductivity of nanofilms and nanotubes, and then report our experimental studies on the thermal conductivity of suspended metallic nanofilms and individual nanotubes. The in-plane thermal conductivity of suspended metallic nanofilms has been measured with the direct current heating method. The measured results show that there exists a strong size effect on the thermal conductivity and the relation between the thermal conductivity and electrical conductivity of these metallic nanofilms is different from that of the bulk materials and does not follow the Wiedemann-Franz law. This result shows that the effect of the grain boundaries on the ability of electrons to transport heat is different from that to transport charge. The thermal conductivity of individual multiwalled carbon nanotubes has been measured by a novel method using a suspended sample-attached T-type nanosensor. The size effect of the different diameters on the thermal conductivity has been observed experimentally, which indicates that the interactions of phonons and electrons between walls affect the thermal conductivity. Our study has provided two simple and reliable methods to measure the thermal conductivity for any kind of individual nanofilms, nanofibers and nanotubes.

Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen Preise und Aborichtlinien Begell House Kontakt Language English 中文 Русский Português German French Spain