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Title: PbTe nanocomposites synthesized from PbTe nanocrystals

Abstract

Dense lead telluride (PbTe) nanocomposites were prepared from PbTe nanocrystals synthesized employing an aqueous solution-phase reaction. This approach reproducibly synthesizes 100-150 nm nanocrystals with a high yield of over 2 g per batch. Densification using spark plasma sintering dimensionally integrated nanoscale grains within a bulk matrix, resulting in a uniform dispersion of nonconglomerated nanocrystals. Transport properties of PbTe nanocomposites were evaluated through temperature dependent resistivity, Hall, Seebeck coefficient, and thermal conductivity measurements. These nanocomposites show an enhancement in the thermoelectric properties compared to bulk polycrystalline PbTe with similar carrier concentrations. Our results also indicate a strong sensitivity to stoichiometry, surface oxygen adsorption, and porosity.

Authors:
; ; ;  [1];  [2]
  1. Department of Physics, University of South Florida, Tampa, Florida 33620 (United States)
  2. (China)
Publication Date:
OSTI Identifier:
20971945
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 22; Other Information: DOI: 10.1063/1.2745218; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADSORPTION; AQUEOUS SOLUTIONS; CARRIER DENSITY; COMPOSITE MATERIALS; CRYSTAL GROWTH; ELECTRIC CONDUCTIVITY; HALL EFFECT; LEAD TELLURIDES; NANOSTRUCTURES; OXYGEN; PLASMA; POLYCRYSTALS; POROSITY; SEEBECK EFFECT; SEMICONDUCTOR MATERIALS; SINTERING; STOICHIOMETRY; TEMPERATURE DEPENDENCE; THERMAL CONDUCTIVITY; THERMOELECTRIC PROPERTIES

Citation Formats

Martin, J., Nolas, G. S., Zhang, W., Chen, L., and State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050. PbTe nanocomposites synthesized from PbTe nanocrystals. United States: N. p., 2007. Web. doi:10.1063/1.2745218.
Martin, J., Nolas, G. S., Zhang, W., Chen, L., & State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050. PbTe nanocomposites synthesized from PbTe nanocrystals. United States. doi:10.1063/1.2745218.
Martin, J., Nolas, G. S., Zhang, W., Chen, L., and State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050. Mon . "PbTe nanocomposites synthesized from PbTe nanocrystals". United States. doi:10.1063/1.2745218.
@article{osti_20971945,
title = {PbTe nanocomposites synthesized from PbTe nanocrystals},
author = {Martin, J. and Nolas, G. S. and Zhang, W. and Chen, L. and State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050},
abstractNote = {Dense lead telluride (PbTe) nanocomposites were prepared from PbTe nanocrystals synthesized employing an aqueous solution-phase reaction. This approach reproducibly synthesizes 100-150 nm nanocrystals with a high yield of over 2 g per batch. Densification using spark plasma sintering dimensionally integrated nanoscale grains within a bulk matrix, resulting in a uniform dispersion of nonconglomerated nanocrystals. Transport properties of PbTe nanocomposites were evaluated through temperature dependent resistivity, Hall, Seebeck coefficient, and thermal conductivity measurements. These nanocomposites show an enhancement in the thermoelectric properties compared to bulk polycrystalline PbTe with similar carrier concentrations. Our results also indicate a strong sensitivity to stoichiometry, surface oxygen adsorption, and porosity.},
doi = {10.1063/1.2745218},
journal = {Applied Physics Letters},
number = 22,
volume = 90,
place = {United States},
year = {Mon May 28 00:00:00 EDT 2007},
month = {Mon May 28 00:00:00 EDT 2007}
}