自然科学进展（英文版）
自然科學進展（英文版）
자연과학진전（영문판）
PROGRESS IN NATURAL SCIENCE
2007年
2期
212-216
,共5页
nanofilm%in-plane thermal conductivity%size effect%Wiedemann-Franz law
The in-plane thermal conductivity of Au nanofilms with thickness of 23 nm, which are fabricated by the electron beamphysical vapor deposition method and a suspension technology, is experimentally measured at 80-300 K by a one-dimensional steady-state electrical heating method. Strong size effects are found on the measured nanofilm thermal conductivity. The Au nanofilm in-plane thermal conductivity is much less than that of the bulk material. With the increasing temperature, the nanofilm thermal conductivity increases.This is opposite to the temperature dependence of the bulk property. The Lorenz number of the Au nanofilms is about three times larger than the bulk value and decreases with the increasing temperature, which indicates the invalidity of the Wiedemann-Franz law for metallic nanofilms.
