1Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084
2Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga 816-8580, Japan
3Graduate School of Engineering, Kyushu University, Fukuoka 812-8581, Japan
Experimental Studies on Thermal and Electrical Properties of Platinum Nanofilms
1Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084
2Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga 816-8580, Japan
3Graduate School of Engineering, Kyushu University, Fukuoka 812-8581, Japan
Abstract： We experimentally studied the in-plane thermal and electrical properties of a suspended platinum nanofilm in thickness of 15nm. The measured results show that the in-plane thermal conductivity, the electrical conductivity and the resistance-temperature coefficient of the studied nanofilm are much less than those of the bulk material, while the Lorenz number is greater than the bulk value. Comparing with the results reported previously for the platinum nanofilm in thickness of 28nm, we further find that the in-plane thermal conductivity, the electrical conductivity and the resistance-temperature coefficient decrease with the decreasing thickness of the nanofilm, while the Lorenz number increases with the decreasing thickness of the nanofilm. These results indicate that strong size effects exist on the in-plane thermal and electrical properties of platinum nanofilms.
2006, Vol. 23 
