Growth of quantum dot coated core-shell anisotropic nanowires for improved thermal and electronic transport

Hou, Bo ORCID: https://orcid.org/0000-0001-9918-8223, Jung, Su-Ho, Zhang, Jingchao, Hong, Yang, Kim, Byung-Sung, Sohn, Jung Inn, Lee, Eun Kyung, Choi, Byoung Lyong, Whang, Dongmok, Cha, SeungNam and Kim, Jong Min 2019. Growth of quantum dot coated core-shell anisotropic nanowires for improved thermal and electronic transport. Applied Physics Letters 114 (24) , -. 10.1063/1.5100891

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Abstract

Anisotropic nanowires are promising candidates for electronic thermal management due to their unique electrical and thermal properties.However, eco-friendly solution-processed nanomaterials with an elaborate morphology and microstructure for modulating thermal andcharge transfer are still a considerable challenge. Herein, we present a simple but effective approach for synthesizing pseudo core-shell nano-wires through quantum dot (QD)-like nanostructure coating (p-NW@QD) to generate exceptional electron-phonon transport properties.With the assistance of diphenyl ether as a coordination solvent, high crystallinity lead sulfide NWs can be fabricated with a large aspect ratiotogether with uniform QD coating. Thisp-NW@QD exhibits high electronic mobility (30.65 cm2/Vs) as well as a diameter independent lowthermal conductivity (1.5361 W/m K). Direct charge/heat carrier flow measurements and computational simulations demonstrate that theunusual electrical and thermal transport phenomenon is strongly dependent on the fast charge transport through the QD shell, and a slowphonon migration across the Umklapp process dominated NW cores. These findings indicate a significant step toward colloidal synthesisnanostructures for future high-performance nanoelectronics and thermal energy devices.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	AIP Publishing
ISSN:	0003-6951
Date of First Compliant Deposit:	13 February 2020
Date of Acceptance:	28 May 2019
Last Modified:	05 May 2023 21:49
URI:	https://orca.cardiff.ac.uk/id/eprint/129554

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