期刊
JOURNAL OF CHEMICAL PHYSICS
卷 135, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3631342
关键词
-
资金
- National Science Foundation (NSF) [ECCS-0601362]
- Oklahoma Center for the Advancement of Science and Technology [AR072-066]
A novel optical method has been developed for the measurement of thermal accommodation coefficients in the temperature-jump regime. The temperature dependence of the resonant frequency of a fused-silica microresonator's whispering-gallery mode is used to measure the rate at which the microresonator comes into thermal equilibrium with the ambient gas. The thermal relaxation time is related to the thermal conductivity of the gas under some simplifying assumptions and measuring this time as a function of gas pressure determines the thermal accommodation coefficient. Using a low-power tunable diode laser of wavelength around 1570 nm to probe a microsphere's whispering-gallery mode through tapered-fiber coupling, we have measured the accommodation coefficients of air, helium, and nitrogen on fused silica at room temperature. In addition, by applying thin-film coatings to the microsphere's surface, we have demonstrated that accommodation coefficients can be measured for various gases on a wide range of modified surfaces using this method. (C) 2011 American Institute of Physics. [doi:10.1063/1.3631342]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据