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Phonon-glass electron-crystal in ZnO-multiwall carbon nanotube nanocomposites

Abstract

We propose a strategy for enhancing thermoelectric performance through the realization of ‘phonon-glass electron-crystal’ (PGEC) by the interface control using multiwall carbon nanotube (MWCNT). By the consolidation of undoped ZnO nanoparticles with MWCNT (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 MWCNT network. Both the 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 they led to the enhancement of thermoelectric figure of merit. We discussed these findings on PGEC 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.

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Publication details

The article was received on 26 May 2017, accepted on 27 Jul 2017 and first published on 28 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR03747C
Citation: Nanoscale, 2017, Accepted Manuscript
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    Phonon-glass electron-crystal in ZnO-multiwall carbon nanotube nanocomposites

    W. H. Nam, B. B. Kim, Y. S. Lim, K. S. Dae, W. Seo, H. Park and J. Y. Lee, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03747C

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