Creating Zipper-Like van der Waals Gap Discontinuity in Low-Temperature-Processed Nanostructured PbBi 2nTe1+3n : Enhanced Phonon Scattering and Improved Thermoelectric Performance
- Nanjing University of Science and Technology (China)
- Vanderbilt University, Nashville, TN (United States)
- Iowa State University, Ames, IA (United States)
- Ames Laboratory, Ames, IA (United States)
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 2 n Te 1+3 n using a solution‐synthesized PbTe‐Bi 2 Te 3 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 .
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Nanjing University of Science and Technology
- Grant/Contract Number:
- FG02-09ER46554; AC02-05CH11231; AE89991/043; FG0209ER46554
- OSTI ID:
- 1597909
- Alternate ID(s):
- OSTI ID: 1460906
- Journal Information:
- Angewandte Chemie (International Edition), Vol. 57, Issue 34; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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