| People | Locations | Statistics |
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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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Scheu, Christina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (49/49 displayed)
- 2024Ostwald Ripening of Ag<sub>2</sub>Te Precipitates in Thermoelectric PbTe: Effects of Crystallography, Dislocations, and Interatomic Bondingcitations
- 2024A potential mechanism for abnormal grain growth in Ni thin films on c-sapphire
- 2024Deciphering the role of Fe impurities in the electrolyte boosting the OER activity of LaNiO$_3$citations
- 2024The effect of Laves phases and nano-precipitates on the electrochemical corrosion resistance of Mg-Al-Ca alloys under alkaline conditionscitations
- 2024Exploring the Effects of the Photochromic Response and Crystallization on the Local Structure of Noncrystalline Niobium Oxidecitations
- 2024Impact of Hierarchical Dopant‐Induced Microstructure on Thermoelectric Properties of p‐Type Si‐Ge Alloys Revealed by Comprehensive Multi‐Scale Characterizationcitations
- 2024Operando Insights on the Degradation Mechanisms of Rhenium‐Doped and Undoped Molybdenum Disulfide Nanocatalysts During Hydrogen Evolution Reaction and Open‐Circuit Conditionscitations
- 2024Ostwald Ripening of Ag2Te precipitates in thermoelectric PbTe: effects of crystallography, dislocations, and interatomic bondingcitations
- 2023Grain Boundary Phases in NbFeSb Half‐Heusler Alloys: A New Avenue to Tune Transport Properties of Thermoelectric Materialscitations
- 2023Laves phases in Mg-Al-Ca alloys and their effect on mechanical properties
- 2023Tailoring the Plasticity of Topologically Close‐packed Phases via the Crystals’ Fundamental Building Blockscitations
- 2023Combined structural analysis and cathodoluminescence investigations of single Pr3+-doped Ca2Nb3O10 nanosheets
- 2023Sodium tantalates: monitoring crystallization via in situ total X-ray scatteringcitations
- 2023Constructing phase diagrams for defects by correlated atomic-scale characterizationcitations
- 2023Tailoring the Plasticity of Topologically Close‐Packed Phases via the Crystals’ Fundamental Building Blockscitations
- 2023Operando Insights on the Degradation Mechanisms of Rhenium-doped and Undoped Molybdenum Disulfide Nanocatalysts for Electrolyzer Applications
- 2023Compositional defects in a MoAlB MAB phase thin film grown by high-power pulsed magnetron sputteringcitations
- 2023Enhancing the Thermoelectric Properties via Modulation of Defects in <i>P</i>‐Type MNiSn‐Based (M = Hf, Zr, Ti) Half‐Heusler Materialscitations
- 2023Preventing Hydrogen Embrittlement: The Role of Barrier Coatings for the Hydrogen Economycitations
- 2023Stability and Failure Mechanisms of Al2O3|Al Bilayer Coatings Exposed to 300 Bar Hydrogen at 673 Kcitations
- 2022Exploring stability of a nanoscale complex solid solution thin film by in situ heating transmission electron microscopycitations
- 2022Elemental (im-)miscibility determines phase formation of multinary nanoparticles co-sputtered in ionic liquidscitations
- 2021Spontaneous fluctuations in a plasma ion assisted deposition – correlation between deposition conditions and vanadium oxide thin film growth
- 2021Monitoring the Structure Evolution of Titanium Oxide Photocatalysts: From the Molecular Form via the Amorphous State to the Crystalline Phasecitations
- 2021Nanocrystalline equiatomic CoCrFeNi alloy thin films: Are they single phase fcc?citations
- 2021Nanocrystalline equiatomic CoCrFeNi alloy thin filmscitations
- 2020Structural Evolution of Ni-Based Co-Catalysts on [Ca2Nb3O10](-) Nanosheets during Heating and Their Photocatalytic Propertiescitations
- 2020Synthesis of plasmonic Fe/Al nanoparticles in ionic liquidscitations
- 2020Microstructure evolution and thermal stability of equiatomic CoCrFeNi films on (0001) alpha-Al2O3citations
- 2020Enhanced antibacterial performance of ultrathin silver/platinum nanopatches by a sacrificial anode mechanismcitations
- 2020Sputter deposition of highly active complex solid solution electrocatalysts into an ionic liquid librarycitations
- 2020Chemical segregation and precipitation at anti-phase boundaries in thermoelectric Heusler-Fe2VAlcitations
- 2020Microstructure evolution and thermal stability of equiatomic CoCrFeNi films on (0001) α-Al2O3citations
- 2020High-throughput characterization of Ag–V–O nanostructured thin-film materials libraries for photoelectrochemical solar water splittingcitations
- 2019Remote Tracking of Phase Changes in Cr2AlC Thin Films by In-situ Resistivity Measurementscitations
- 2019Combinatorial synthesis of binary nanoparticles in ionic liquids by cosputtering and mixing of elemental nanoparticlescitations
- 2019Photocurrent recombination through surface segregation in Al-Cr-Fe-O photocathodescitations
- 2019Microstructure evolution and orientation relationships of CoCrFeNi thin films grown on (0001) alpha-Al2O3
- 2019Toward a paradigm shift in electrocatalysis using complex solid solution nanoparticlescitations
- 2019On pinning-depinning and microkink-flow in solid state dewetting: Insights by in-situ ESEM on Al thin filmscitations
- 2018Discovery of a multinary noble metal-free oxygen reduction catalystcitations
- 2018Controlling the Amorphous and Crystalline State of Multinary Alloy Nanoparticles in An Ionic Liquidcitations
- 2018Investigation of Vanadate-metal-oxide thin film systems for solar water splitting
- 2018Combinatorial synthesis and high-throughput characterization of Fe-V-O thin-film materials libraries for solar water splittingcitations
- 2017Fabrication and characterization of abrupt TiO 2 –SiO x core-shell nanowires by a simple heat treatmentcitations
- 2014Tin doping speeds up hole transfer during light-driven water oxidation at hematite photoanodescitations
- 2010Influence of Yttrium on the Thermal Stability of Ti-Al-N Thin Filmscitations
- 2007Tribological properties of nanocomposite CrC x /a-C:H thin filmscitations
- 2003Amorphous Films at Metal/Ceramic Interfacescitations
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article
Ostwald Ripening of Ag<sub>2</sub>Te Precipitates in Thermoelectric PbTe: Effects of Crystallography, Dislocations, and Interatomic Bonding
Abstract
<jats:title>Abstract</jats:title><jats:p>Nanostructuring is important for designing thermoelectrics. Yet, nanoprecipitates are thermodynamically unstable and coarsen through Ostwald ripening. Here, the Ostwald ripening of Ag<jats:sub>2</jats:sub>Te in PbTe and its resulting impact on thermoelectric performance is investigated. Numerous Guinier‐Preston zones and platelet Ag<jats:sub>2</jats:sub>Te precipitates in the sample quenched from a single‐phase region is observed. Upon annealing, these platelet precipitates grow into big lath‐shaped second phases by consuming small Ag‐rich clusters. The crystallographic orientation relationships between Ag<jats:sub>2</jats:sub>Te and PbTe are unraveled by scanning transmission electron microscopy and modeled by first‐principles calculations. The interfaces with low lattice mismatch determine the morphology of Ag<jats:sub>2</jats:sub>Te in PbTe. Atom probe tomography reveals different chemical bonding mechanisms for PbTe and Ag<jats:sub>2</jats:sub>Te, which are metavalent and iono‐covalent, respectively. This leads to an acoustic phonon mismatch at the precipitate‐matrix interface. Yet, the electrons are also scattered by these interfaces, resulting in poor electrical properties in the as‐quenched sample. In contrast, the annealed sample contains abundant Ag‐decorated dislocations by activating the Bardeen‐Herring source. These dislocations strongly scatter phonons while maintaining a good electron transmission, contributing to a higher thermoelectric performance. This work demonstrates the complex role of microstructure morphologies, compositions, and bonding mechanisms in thermoelectric response, providing insights into structural design for thermoelectrics.</jats:p>