【摘 要】
：
Active heat flow control is essential for broad applications of heating,cooling and energy conversion.Like electronic devices developed for the control of e
【机 构】
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CollegeofEngineeringandAppliedSciences,NanjingUniversity,P.R.China
【出 处】
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The 2nd International Conference on Phononics and thermal En
论文部分内容阅读
Active heat flow control is essential for broad applications of heating,cooling and energy conversion.Like electronic devices developed for the control of electric power,it is very desirable to develop advanced all-thermal solid-state devices that actively control heat flow,without consuming other forms of energy.Here we demonstrate temperature-gated thermal rectification using vanadium dioxide beams,in which the environment temperature actively modulates asymmetric heat flow.In this three terminal device,there are two switchable states,which can be regulated by global heating.In the “Rectifier” state,we observed up to 28%thermal rectification.In the "Resistor" state,the thermal rectification is significantly suppressed(<1%).To the best of our knowledge,this is the first demonstration of solid-state active-thermal devices,with a large rectification in the "Rectifier" state.This temperature-gated rectifier can have substantial implications ranging from autonomous thermal management of heating and cooling systems to efficient thermal energy conversion and storage.
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