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Issue 11, 2015
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Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires

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Abstract

The diameter-dependent thermoelectric properties of individual single-crystalline Bi nanowires grown by the on-film formation of nanowires method have been investigated. The electrical resistivity, Seebeck coefficient, and thermal conductivity were measured as functions of the nanowire diameter using an individual nanowire device. The thermoelectric figure of merit (ZT) calculated from the measured thermoelectric properties shows an increase from the bulk value to a maximum value of 0.28 at 109 nm-diameter, followed by a decrease upon further decreasing the diameter. This non-monotonic diameter dependence of ZT in Bi nanowires reveals simultaneous positive and negative contributions to the thermoelectric efficiency, driven by the change in intrinsic properties, which originates from the diameter-dependent classical and quantum size effects.

Graphical abstract: Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires

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Publication details

The article was received on 31 Oct 2014, accepted on 09 Jan 2015 and first published on 12 Jan 2015


Article type: Paper
DOI: 10.1039/C4NR06412G
Citation: Nanoscale, 2015,7, 5053-5059
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    Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires

    J. Kim, S. Lee, Y. M. Brovman, P. Kim and W. Lee, Nanoscale, 2015, 7, 5053
    DOI: 10.1039/C4NR06412G

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