PbTe nanocomposites synthesized from PbTe nanocrystals

被引：135

作者：

Martin, J. ^{[1
]}

Nolas, G. S.

Zhang, W.

Chen, L.

机构：

[1] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 22期

关键词：

D O I：

10.1063/1.2745218

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (C) 2007 American Institute of Physics.

引用

页数：3

共 22 条

[1] INTERPRETATION OF HALL COEFFICIENT ELECTRICAL RESISTIVITY AND SEEBECK COEFFICIENT OF P-TYPE LEAD TELLURIDE [J].