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Creating Zipper-Like van der Waals Gap Discontinuity in Low-Temperature-Processed Nanostructured PbBi 2n Te 1+3n : Enhanced Phonon Scattering and Improved Thermoelectric Performance.
- Source :
-
Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2018 Aug 20; Vol. 57 (34), pp. 10938-10943. Date of Electronic Publication: 2018 Jul 19. - Publication Year :
- 2018
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Abstract
- Nanoengineered materials can embody distinct atomic structures which deviate from that of the bulk-grain counterpart and induce significantly modified electronic structures and physical/chemical properties. The phonon structure and thermal properties, which can also be potentially modulated by the modified atomic structure in nanostructured materials, however, are seldom investigated. Employed here is a mild approach to fabricate nanostructured PbBi <subscript>2n</subscript> Te <subscript>1+3n</subscript> using a solution-synthesized PbTe-Bi <subscript>2</subscript> Te <subscript>3</subscript> nano-heterostructure as a precursor. The as-obtained monoliths have unprecedented atomic structure, differing from that of the bulk counterpart, especially the zipper-like van der Waals gap discontinuity and the random arrangement of septuple-quintuple layers. These structural motifs break the lattice periodicity and coherence of phonon transport, leading to ultralow thermal conductivity and excellent thermoelectric z T.<br /> (© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Details
- Language :
- English
- ISSN :
- 1521-3773
- Volume :
- 57
- Issue :
- 34
- Database :
- MEDLINE
- Journal :
- Angewandte Chemie (International ed. in English)
- Publication Type :
- Academic Journal
- Accession number :
- 29949673
- Full Text :
- https://doi.org/10.1002/anie.201805890