Thermal conductance of single-molecule junctions

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Thermal conductance of single-molecule junctions
Author
Cui, LongjiHur, SunghoonAkbar, Zico AlaiaKlöckner, Jan C.Jeong, WonhoPauly, FabianJang, Sung-YeonReddy, PramodMeyhofer, Edgar
Issue Date
2019-08
Publisher
Nature Publishing Group
Citation
NATURE, v.572, no.7771, pp.628 - 633
Abstract
Single-molecule junctions have been extensively used to probe properties as diverse as electrical conduction, light emission, thermoelectric energy conversion, quantum interference, heat dissipation and electronic noise at atomic and molecular scales. However, a key quantity of current interest—the thermal conductance of single-molecule junctions—has not yet been directly experimentally determined, owing to the challenge of detecting minute heat currents at the picowatt level. Here we show that picowatt-resolution scanning probes previously developed to study the thermal conductance of single-metal-atom junctions, when used in conjunction with a time-averaging measurement scheme to increase the signal-to-noise ratio, also allow quantification of the much lower thermal conductance of single-molecule junctions. Our experiments on prototypical Au–alkanedithiol–Au junctions containing two to ten carbon atoms confirm that thermal conductance is to a first approximation independent of molecular length, consistent with detailed ab initio simulations. We anticipate that our approach will enable systematic exploration of thermal transport in many other one-dimensional systems, such as short molecules and polymer chains, for which computational predictions of thermal conductance have remained experimentally inaccessible.
URI
https://scholarworks.unist.ac.kr/handle/201301/27390
URL
https://www.nature.com/articles/s41586-019-1420-z
DOI
10.1038/s41586-019-1420-z
ISSN
0028-0836
Appears in Collections:
ECHE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU