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2024 (English)In: ACS Applied Nano Materials, E-ISSN 2574-0970, Vol. 7, no 3, p. 3428-3435Article in journal (Refereed) Published
Abstract [en]
Nanostructured materials and nanocomposites have shown great promise for improving the efficiency of thermoelectric materials. Herein, Fe nanoparticles were imbedded into a CrN matrix by combining two physical vapor deposition approaches, namely, high-power impulse magnetron sputtering and a nanoparticle gun. The combination of these techniques allowed the formation of nanocomposites in which the Fe nanoparticles remained intact without intermixing with the matrix. The electrical and thermal transport properties of the nanocomposites were investigated and compared to those of a monolithic CrN film. The measured thermoelectric properties revealed an increase in the Seebeck coefficient, with a decrease of hall carrier concentration and an increase of the electron mobility, which could be explained by energy filtering by internal phases created at the NP/matrix interface. The thermal conductivity of the final nanocomposite was reduced from 4.8 W m-1 K-1 to a minimum of 3.0 W m-1 K-1. This study shows prospects for the nanocomposite synthesis process using nanoparticles and its use in improving the thermoelectric properties of coatings.
Place, publisher, year, edition, pages
American Chemical Society, 2024
Keywords
electrical transport, electron energy filtering, nanocomposites, nanoparticles, physical vapor deposition, thermal transport, thermoelectric thin films
National Category
Materials Chemistry
Research subject
Experimental Physics
Identifiers
urn:nbn:se:ltu:diva-104596 (URN)10.1021/acsanm.3c06054 (DOI)001159423900001 ()2-s2.0-85184907583 (Scopus ID)
Note
Validerad;2024;Nivå 2;2024-04-04 (joosat);
Funder: Swedish Research Council VR-RFI (2019-00191); Swedish Foundation for Strategic Research (RIF14-0053); Knut and Alice Wallenberg Foundation (KAW 2016.0346); VR (2021-03826);
Full text license: CC BY
2024-03-142024-03-142025-02-06Bibliographically approved