Morphological Evolution of Te and Bi2Te3 Microstructures during Galvanic Displacement of Electrodeposited Co Thin Films
| Autor: | Jinseong Noh, Seok-Hoon Lee, Hoyoung Suh, Kimin Hong, Nosang V. Myung, Jin-Gyu Kim, Ji Hyun Lee |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering Whiskers Metallurgy 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences eye diseases Grain size 0104 chemical sciences chemistry.chemical_compound Chemical engineering chemistry Electrochemistry Galvanic cell Bismuth telluride sense organs Single displacement reaction Thin film 0210 nano-technology |
| Zdroj: | Electrochimica Acta. 255:1-8 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2017.09.049 |
| Popis: | Co thin films with different crystalline structures including preferred orientation and grain size were electrodeposited from electrolytes containing an additive N-Dimethyldithiocarbamic acid ester, sodium salt, (DPS). Subsequently, the Co electrodeposits were converted to Te and Bi2Te3 via galvanic displacement reaction (GDR) processes. The morphologies of the produced Te and Bi2Te3 exhibited granular structures including whiskers and dendrites. Structural analyses showed that the microstructures strongly depended on the crystalline structure of the original Co thin films, which were also affected by the concentration of DPS. The formation mechanism of the Te whiskers and Bi2Te3 dendrites were elucidated by various analyses. |
| Databáze: | OpenAIRE |
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