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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Why one can expect large rectification in molecular junctions based on alkane monothiols and why rectification is so modest
The Stark effect plays a key role in understanding why, against expectation, alkane thiols are not high-performance molecular rectifiers.
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- Award ID(s):
- 1708173
- PAR ID:
- 10066839
- Publisher / Repository:
- Royal Society of Chemistry (RSC)
- Date Published:
- Journal Name:
- Chemical Science
- Volume:
- 9
- Issue:
- 19
- ISSN:
- 2041-6520
- Page Range / eLocation ID:
- 4456 to 4467
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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