STUDY SIZE EFFECTS ON NONEQUILIBRIUM HEAT TRANSFER IN THIN GOLD FILM THROUGH TRANSIENT THERMOREFLECTANCE MEASUREMENTS

摘要：

The nonequilibrium heat transfer in several thin gold films with thickness of 23.1, 27.2, 39.9, 55.5, and 84.7 nm has been studied at 300 K by using the rear-pump front-probe transient thermoreflectance measurements. The results show that the nonequilibrium heat transfer in thin film is nearly the same as that of bulk and independent of film thickness, which is inconsistent with the theory that reduced size will shorten electron mean free path and subsequently enhance nonequilibrium heat transfer. And hence, the size effects on nonequilibrium heat transfer need be reconsidered. The underlying mechanism is that the electron-film surface interaction and electron-grain boundary interaction are sufficiently weak compared to bulk electron-phonon interaction in the present film thickness region.

作者: Weigang Ma Haidong Wang Xing Zhang Wei Wang

作者单位: Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua Universit Institute of Microelectronics Peking University Beijing, China, 100871

会议类型: 国际会议

会议名称: The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)

会议地点: 北京

会议语种:英文

页码: 929-934

在线出版日期: 2010-10-19（万方平台首次上网日期，不代表论文的发表时间）