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  • Title: Dual-mode solid-state thermal rectification.
    Author: Shrestha R, Luan Y, Luo X, Shin S, Zhang T, Smith P, Gong W, Bockstaller M, Luo T, Chen R, Hippalgaonkar K, Shen S.
    Journal: Nat Commun; 2020 Aug 28; 11(1):4346. PubMed ID: 32859936.
    Abstract:
    Thermal rectification is an exotic thermal transport phenomenon which allows heat to transfer in one direction but block the other. We demonstrate an unusual dual-mode solid-state thermal rectification effect using a heterogeneous "irradiated-pristine" polyethylene nanofiber junction as a nanoscale thermal diode, in which heat flow can be rectified in both directions by changing the working temperature. For the nanofiber samples measured here, we observe a maximum thermal rectification factor as large as ~50%, which only requires a small temperature bias of <10 K. The tunable nanoscale thermal diodes with large rectification and narrow temperature bias open up new possibilities for developing advanced thermal management, energy conversion and, potentially thermophononic technologies.
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