| Autor: |
B M AK; Department of Chemistry, Birla Institute of Technology and Science, Pilani - Hyderabad Campus, Hyderabad 500078, India., Sarkar D; New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bengaluru 560064, India., Guin SN; Department of Chemistry, Birla Institute of Technology and Science, Pilani - Hyderabad Campus, Hyderabad 500078, India. |
| Jazyk: |
angličtina |
| Zdroj: |
Inorganic chemistry [Inorg Chem] 2024 May 20; Vol. 63 (20), pp. 9078-9083. Date of Electronic Publication: 2024 May 03. |
| DOI: |
10.1021/acs.inorgchem.4c00231 |
| Abstrakt: |
Noble-metal-based chalcogenide materials recently gained massive attention in the field of thermoelectrics. In most cases, materials are synthesized using (i) high-temperature solid-state reactions or (ii) soft chemical methods where temperature requirements are lower than those of solid-state reactions (generally below 400 °C). Herein, we present a simple, surfactant-free, room-temperature, and energy-efficient synthesis of Ag 3 CuS 2 nanocrystals. The present synthesis technique is scalable and capable of gram-scale production. A spark plasma sintering (SPS) pressed sample exhibits ultralow thermal conductivity (∼0.31 W/mK at room temperature). We found that Ag 3 CuS 2 exhibits low sound velocity, as well as a non-Debye-like behavior based on a low-temperature heat capacity measurement. A high degree of anharmonicity of bonding, soft vibrations modes, and nanoscale grain boundary scattering in Ag 3 CuS 2 lead to ultralow thermal conductivity, which can be important for thermoelectrics, optoelectronics, and thermal barrier coating applications. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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