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Creating Zipper-Like van der Waals Gap Discontinuity in Low-Temperature-Processed Nanostructured PbBi2nTe1+3n: Enhanced Phonon Scattering and Improved Thermoelectric Performance

TitleCreating Zipper-Like van der Waals Gap Discontinuity in Low-Temperature-Processed Nanostructured PbBi2nTe1+3n: Enhanced Phonon Scattering and Improved Thermoelectric Performance
Publication TypeJournal Article
Year of Publication2018
AuthorsXu, B, Feng, TL, Li, Z, Zhou, L, Pantelides, ST, Wu, Y
JournalAngewandte Chemie-International Edition
Volume57
Pagination10938-10943
Date Published08
Type of ArticleArticle
ISBN Number1433-7851
Accession NumberWOS:000442863700024
Keywordsatomic structure, bi2te3, chemistry, gold, high figure, Materials Science, merit, nanoparticles, nanostructures, phonons, reduction, system, tellurium
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 PbBi2nTe1+3n using a solution-synthesized PbTe-Bi2Te3 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 zT.

DOI10.1002/anie.201805890
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Alternate JournalAngew. Chem.-Int. Edit.