Bismuth telluride nanotubes and the effects on the thermoelectric properties of nanotube-containing nanocomposites

Nanotubes of quasilayered bismuth telluride compound were prepared by hydrothermal synthesis. Nanotubes have diameters smaller than 100nm and spiral tube-walls. The low-dimensional morphology and hollow structure enable bismuth telluride nanotubes to be a potential thermoelectric material with a high figure of merit due to the efficient phonon blocking effect. The experimental results show that the addition of nanotubes leads to a remarkable decrease in the thermal conductivity with the electrical conductivity much less affected and thus to an increase in the figure of merit of the Bi2Te3-based material.

[1]  X. Zhao,et al.  Solvothermal synthesis of nano-sized La x Bi (2¿x) Te 3 thermoelectric powders , 2004 .

[2]  Ronald Gronsky,et al.  Fabrication of High‐Density, High Aspect Ratio, Large‐Area Bismuth Telluride Nanowire Arrays by Electrodeposition into Porous Anodic Alumina Templates , 2002 .

[3]  D. Voss.  The 110% Solution , 1996, Science.

[4]  D. VanDerveer,et al.  Temperature dependent structural and transport properties of the type II clathrates A8Na16E136 (A=Cs or Rb and E=Ge or Si) , 2002 .

[5]  Yanzhao Zhang,et al.  Effect of solvent on the microstructures of nanostructured Bi2Te3 prepared by solvothermal synthesis , 2004 .

[6]  Yuanhua Lin,et al.  Organic-assisted growth of bismuth telluride nanocrystals , 2003 .

[7]  W. K. Maser,et al.  Large-scale production of single-walled carbon nanotubes by the electric-arc technique , 1997, Nature.

[8]  R. Venkatasubramanian,et al.  Thin-film thermoelectric devices with high room-temperature figures of merit , 2001, Nature.

[9]  F. Disalvo,et al.  Thermoelectric cooling and power generation , 1999, Science.

[10]  Yu-Ming Lin,et al.  Semimetal–semiconductor transition in Bi1−xSbx alloy nanowires and their thermoelectric properties , 2002 .

[11]  M. P. Walsh,et al.  Quantum Dot Superlattice Thermoelectric Materials and Devices , 2002, Science.

[12]  Terry M. Tritt,et al.  Holey and Unholey Semiconductors , 1999, Science.

[13]  C. Nan,et al.  Ligand-assisted control growth of chainlike nanocrystals , 2003 .

[14]  G. A. Slack,et al.  Some properties of semiconducting IrSb3 , 1994 .

[15]  T. Takabatake,et al.  Thermoelectric properties of a clathrate compound Ba8Cu16P30 , 2003 .

[16]  Heon-Jin Choi,et al.  Single-crystal gallium nitride nanotubes , 2003, Nature.

[17]  S. Iijima.  Helical microtubules of graphitic carbon , 1991, Nature.

[18]  Uher,et al.  CsBi(4)Te(6): A high-performance thermoelectric material for low-temperature applications , 2000, Science.

[19]  C. Uher,et al.  Thermoelectric properties of the n-type filled skutterudite Ba0.3Co4Sb12 doped with Ni , 2002 .