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Thermal transport through single-molecule junctions
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Mosso, Nico, Sadeghi, Hatef, Gemma, Andrea, Sangtarash, Sara, Drechsler, Ute, Lambert, Colin and Gotsmann, Bernd (2019) Thermal transport through single-molecule junctions. Nano Letters, 19 (11). pp. 7614-7622. doi:10.1021/acs.nanolett.9b02089 ISSN 1530-6984.
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Official URL: https://doi.org/10.1021/acs.nanolett.9b02089
Abstract
Molecular junctions exhibit a rich and tunable set of thermal transport phenomena. However, the predicted high thermoelectric efficiencies, phonon quantum interference effects, rectification, and nonlinear heat transport properties of organic molecules are yet to be verified because suitable experimental techniques have been missing. Here, by combining the break junction technique with suspended heat-flux sensors with picowatt per Kelvin sensitivity, we measured the thermal and electrical conductance of single organic molecules at room temperature simultaneously. We used this method to study the thermal transport properties of two model systems, namely, dithiol-oligo(phenylene ethynylene) and octane dithiol junctions with gold electrodes. In agreement with our density functional theory and phase-coherent transport calculations, we show that heat transport across these systems is governed by the phonon mismatch between the molecules and the metallic electrodes. This work represents the first measurement of thermal transport through single molecules and opens new opportunities for studying heat management at the nanoscale level.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QH Natural history |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||||
Library of Congress Subject Headings (LCSH): | Heat -- Transmission, Cell junctions, Thermal conductivity | ||||||||||||
Journal or Publication Title: | Nano Letters | ||||||||||||
Publisher: | American Chemical Society | ||||||||||||
ISSN: | 1530-6984 | ||||||||||||
Official Date: | 13 November 2019 | ||||||||||||
Dates: |
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Volume: | 19 | ||||||||||||
Number: | 11 | ||||||||||||
Page Range: | pp. 7614-7622 | ||||||||||||
DOI: | 10.1021/acs.nanolett.9b02089 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Reuse Statement (publisher, data, author rights): | ACS AuthorChoice License: https://pubs.acs.org/page/policy/authorchoice_termsofuse.html | ||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
Date of first compliant deposit: | 24 February 2020 | ||||||||||||
Date of first compliant Open Access: | 24 February 2020 | ||||||||||||
RIOXX Funder/Project Grant: |
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