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Synthesis and thermoelectric characterization of bulk-type tellurium nanowire/polymer nanocomposites

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Abstract

A simple method to fabricate three-dimensionally (3-D) aligned thermoelectric nanowires attached polymer particle was demonstrated by combination of solution casting of thermoelectric nanostructures (e.g., tellurium nanowires (Te NWs)) on the surface of thermoplastic polymer (e.g., poly(methyl methacrylate (PMMA)) microbeads followed by hot compaction of thermoplastic matrix. The percolation threshold of composite with 3-D assembled Te NWs (i.e., 3.45 vol%) significantly was lower than that of a randomly dispersed Te NWs (i.e., 5.26 vol%), which resulted in an order of magnitude greater thermoelectric figure of merit (ZT of 2.8 × 10−3) compared to randomly dispersed Te NWs in PMMA matrix (ZT of 6.4 × 10−4) at room temperature by enhancing the electrical conductivity without increasing thermal conductivity.

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Acknowledgements

This work was supported by a grant from the Fundamental R&D Program for Core Technology of Materials (10050890, Chalcogenide nanostructure-based room-temperature (25 °C) H2 & H2S gas sensors with low power consumption) and supported by Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (No. 2016M3A7B4900044).

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Correspondence to Nosang V. Myung or Yong-Ho Choa.

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Kim, S., Lee, YI., Ryu, S.H. et al. Synthesis and thermoelectric characterization of bulk-type tellurium nanowire/polymer nanocomposites. J Mater Sci 52, 12724–12733 (2017). https://doi.org/10.1007/s10853-017-1384-z

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  • DOI: https://doi.org/10.1007/s10853-017-1384-z

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