Studies on Nanocrystalline Bismuth Telluride

Journal Article · Mon Oct 04 04:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3504320· OSTI ID:21454840

Ghatak, Amitava ^[1]

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1. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam-781039 (India)

Nanostructured thermoelectric bismuth telluride powders with various hydrothermal synthesis times were synthesised to give an experimental comprehension on the formation of the nanopowders. Nanoparticles were synthesised at 130 deg. C for 24 h and 72 h. Bi{sub 2}Te{sub 3} nanoparticles with grain sizes 120A and 170A exhibit n-type semiconducting behaviour with a decrease in Seebeck coefficient with increasing temperature range. The activation energy ({Delta}E{sub S}) calculated from S vs. 1000/T graphs decreases with increasing synthesis time. This variation in {Delta}E{sub S} with synthesis time of the Bi{sub 2}Te{sub 3} nanomaterial may be due to the small amount unreacted carrier content in the material.

• OSTI ID: 21454840
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1276; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ACTIVATION ENERGY
BISMUTH COMPOUNDS
BISMUTH TELLURIDES
CHALCOGENIDES
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
GRAIN SIZE
HYDROTHERMAL SYNTHESIS
MATERIALS
MICROSTRUCTURE
NANOSTRUCTURES
PARTICLES
PHYSICAL PROPERTIES
POWDERS
SCATTERING
SIZE
SYNTHESIS
TELLURIDES
TELLURIUM COMPOUNDS
TEMPERATURE DEPENDENCE
THERMOELECTRIC MATERIALS
X-RAY DIFFRACTION