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Creating Zipper-Like van der Waals Gap Discontinuity in Low-Temperature-Processed Nanostructured PbBi 2nTe1+3n : Enhanced Phonon Scattering and Improved Thermoelectric Performance

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [3];  [4];  [2];  [3]
  1. Nanjing University of Science and Technology (China); Vanderbilt University
  2. Vanderbilt University, Nashville, TN (United States)
  3. Iowa State University, Ames, IA (United States)
  4. Ames Laboratory, Ames, IA (United States)
+ Show Author Affiliations
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 z T.
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
Nanjing University of Science and Technology; USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231; FG02-09ER46554
OSTI ID:
1597909
Alternate ID(s):
OSTI ID: 22725096
OSTI ID: 1460906
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 34 Vol. 57; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (4)

Figure 1(p. 3)figure Figure 1
Figure 2(p. 4)figure Figure 2
Figure 3(p. 5)figure Figure 3
Figure 4(p. 6)figure Figure 4

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