Phonon-glass electron-crystals in ZnO-multiwalled carbon nanotube nanocomposites

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Title
Phonon-glass electron-crystals in ZnO-multiwalled carbon nanotube nanocomposites
Author(s)
Woo Hyun Nam; Bo Bae Kim; Young Soo Lim; Kyun Seong Dae; Won-Seon Seo; Hyung-Ho Park; Jeong Yong Lee
Publication Date
2017-09
Journal
NANOSCALE, v.9, no.35, pp.12941 - 12948
Publisher
ROYAL SOC CHEMISTRY
Abstract
We propose a strategy for enhancing thermoelectric performance through the realization of a 'phonon-glass electron-crystal' (PGEC) by interface control using multiwalled carbon nanotubes (MWCNTs). By the consolidation of undoped ZnO nanoparticles with MWCNTs (0.5, 1, and 2 wt%) using spark plasma sintering, we fabricated the interface-controlled ZnO-MWCNT nanocomposites, in which ZnO grains were surrounded with a MWCNT network. Both single crystal-like charge transport (electron-crystal) and considerably reduced thermal conductivity (phonon-glass) were achieved simultaneously thanks to the beneficial effects of the MWCNT network, and this led to the enhancement of the thermoelectric figure of merit. We discussed these findings on PGECs in the ZnO-MWCNT nanocomposites from the viewpoint of interface control in detail, and our strategy may provide a promising way to the realization of PGEC in other hybrid thermoelectric materials. © 2017 The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/3978
ISSN
2040-3364
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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