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Serrano Sánchez, Federico Gharsallah, Mouna Nemes, Norbert Marcel Biskup Zaja, Nevenko Varela Del Arco, María Martínez, José Luis Fernández Díaz, María Teresa Alonso, José Antonio 2024-01-08T15:15:59Z 2024-01-08T15:15:59Z 2017 Serrano-Sánchez, F., Gharsallah, M., Nemes, N.M. et al. Enhanced figure of merit in nanostructured (Bi,Sb)2Te3 with optimized composition, prepared by a straightforward arc-melting procedure. Sci Rep 7, 6277 (2017). https://doi.org/10.1038/s41598-017-05428-4 10.1038/s41598-017-05428-4 https://hdl.handle.net/20.500.14352/91844 2045-2322 https://doi.org/10.1038/s41598-017-05428-4 https://www.nature.com/articles/s41598-017-05428-4 Sb-doped Bi2Te3 is known since the 1950s as the best thermoelectric material for near-room temperature operation. Improvements in material performance are expected from nanostructuring procedures. We present a straightforward and fast method to synthesize already nanostructured pellets that show an enhanced ZT due to a remarkably low thermal conductivity and unusually high Seebeck coefficient for a nominal composition optimized for arc-melting: Bi0.35Sb1.65Te3. We provide a detailed structural analysis of the Bi2−xSbxTe3 series (0 ≤ x ≤ 2) based on neutron powder diffraction as a function of composition and temperature that reveals the important role played by atomic vibrations. Arc-melting produces layered platelets with less than 50 nm-thick sheets. The low thermal conductivity is attributed to the phonon scattering at the grain boundaries of the nanosheets. This is a fast and cost-effective production method of highly efficient thermoelectric materials. eng http://creativecommons.org/licenses/by/4.0/ open access Attribution 4.0 International Enhanced figure of merit in nanostructured (Bi,Sb)2Te3 with optimized composition, prepared by a straightforward arc-melting procedure journal article