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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ruiz, Diana Talia Alvarez
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2021Self-energized organic-inorganic hybrid composite for surface enhanced Raman spectroscopycitations
- 2020Enhancing the Thermoelectric Performance of Calcium Cobaltite Ceramics by Tuning Composition and Processingcitations
- 2020The effect of nano-twins on the thermoelectric properties of Ga2O3(ZnO)(m) (m=9, 11, 13 and 15) homologous compoundscitations
- 2019Self-Nanostructuring in SrTiO3
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article
The effect of nano-twins on the thermoelectric properties of Ga2O3(ZnO)(m) (m=9, 11, 13 and 15) homologous compounds
Abstract
<p>Ga<sub>2</sub>O<sub>3</sub>(ZnO)<sub>m</sub> (m = integer) homologous compounds are naturally occurring nanostructured materials. Their intrinsically low thermal conductivity makes them attractive for thermoelectric applications. High density Ga<sub>2</sub>O<sub>3</sub>(ZnO)<sub>m</sub> (m = 9, 11, 13, and 15) single phase ceramics were prepared by solid-state reaction. Nano-sized, twin-like V-shaped boundaries parallel to b-axis (apex angle ∼ 60°) were observed for all compositions. Atomic resolution Z-contrast imaging and EDS analysis for m = 15 showed segregation of Ga ions at the interface of V-shaped twin boundaries. Thermal and charge transport properties depend on the value of m. Compositions with m = 9 exhibited very low lattice thermal conductivity of 2 to 1.5 W/m.K at 300 K–900 K; compositions with m=15 showed improved power factor of 140 μW/m. K<sup>2</sup> at 900 K leading to a thermoelectric figure of merit (ZT value) of 0.055. This study explores the structural variants and routes to improve the thermoelectric properties of these materials</p>