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Thermal Characterization of Nanowire Array in a-Al2O3 Matrix

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Abstract

Thermal properties characterization of Bi nanowires is critical in order to validate the predicted enhancement of their thermoelectric figure-of-merit. In this paper we report the effective thermal diffusivity of Bi nanowires array embedded in a-Al2O3 (alumina) template. The composite material consists of 85% alumina and approximately 15% Bi nanowires with a diameter of 40 nm and an average length of 40 [.proportional]m. Measurements are performed along the nanowire axis. A thermal wave is produced at the front side of the sample and it is monitored at the backside through a fast thermoelectric effect. A one-dimensional heat conduction model is used to extract the thermal diffusivity.

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Authors and Affiliations

  1. Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA

    Diana-Andra Borca-Tasciuc & Gang Chen

  2. Physics Department, Cambridge, MA, 02139, USA

    Yu-Ming Lin, Oded Rabin & Mildred S. Dresselhaus

  3. Electrical Engineering Department, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA

    Mildred S. Dresselhaus

  4. Jet Propulsion Laboratory/, California Institute of Technology, 4800 Oak Grove Drive, MS 277-207, Pasadena, CA, 91109, USA

    Alexander Borshchevsky, Jean-Pierre Fleurial & Margaret A. Ryan

Authors
  1. Diana-Andra Borca-Tasciuc
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  2. Gang Chen
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  3. Yu-Ming Lin
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  4. Oded Rabin
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  5. Mildred S. Dresselhaus
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  6. Alexander Borshchevsky
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  7. Jean-Pierre Fleurial
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  8. Margaret A. Ryan
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Visiting student frm UCLA.

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Borca-Tasciuc, DA., Chen, G., Lin, YM. et al. Thermal Characterization of Nanowire Array in a-Al2O3 Matrix. MRS Online Proceedings Library 703, 27 (2001). https://doi.org/10.1557/PROC-703-V2.7

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  • DOI: https://doi.org/10.1557/PROC-703-V2.7

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