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Thermal Conductivity of One-Dimensional Silicon-Germanium Alloy Nanowires

[+] Author Affiliations
Yunki Gwak, Vinay Narayanunni, Choongho Yu

Texas A&M University, College Station, TX

Sang-Won Jee, Jung-Ho Lee

Hanyang University, Ansan, Republic of Korea

Anastassios A. Mavrokefalos

Massachusetts Institute of Technology, Cambridge, MA

Michael T. Pettes, Li Shi

University of Texas at Austin, Austin, TX

Paper No. HT2009-88563, pp. 367-369; 3 pages
doi:10.1115/HT2009-88563
From:
  • ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
  • Volume 2: Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Computational Heat Transfer
  • San Francisco, California, USA, July 19–23, 2009
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4357-4 | eISBN: 978-0-7918-3851-8
  • Copyright © 2009 by ASME

abstract

Thermal properties of one dimensional nanostructures are of interest for thermoelectric energy conversion. Thermoelectric efficiency is related to non dimensional thermoelectric figure of merit, ZT = (S^2 σT)/k where S, σ, k are the Seebeck coefficient, electrical conductivity and thermal conductivity respectively. These physical properties are interdependent, and hence making ZT of a material high is very challenging work. However, when the size of nanostructure is comparable to the wavelength and mean free path of energy carriers, it is feasible to avoid such interdependence to enhance ZT energy conversion. [1–3]

Copyright © 2009 by ASME

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