High-purity Cu nanocrystal synthesis by a dynamic decomposition method
| Autor: | Wang Fei, Chengui Zhang, Guozhang Chen, Liangjun Yin, Qing Zeng, Yu Cao, Chao Wang, Hui Tang, Sixin Wu, Xian Jian, Ying-Lin Liang, Luan Chunhong, Jing Jiang |
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| Rok vydání: | 2014 |
| Předmět: |
Thermogravimetric analysis
Materials science Nano Express Cu nanocrystals Scanning electron microscope Thermal decomposition Nanotechnology Chemical vapor deposition Tartrate Condensed Matter Physics Precursor decomposition chemistry.chemical_compound Differential scanning calorimetry Materials Science(all) chemistry Nanocrystal Chemical engineering Transmission electron microscopy Cupric tartrate General Materials Science Chemical vapor decomposition |
| Zdroj: | Nanoscale Research Letters |
| ISSN: | 1556-276X |
| Popis: | Cu nanocrystals are applied extensively in several fields, particularly in the microelectron, sensor, and catalysis. The catalytic behavior of Cu nanocrystals depends mainly on the structure and particle size. In this work, formation of high-purity Cu nanocrystals is studied using a common chemical vapor deposition precursor of cupric tartrate. This process is investigated through a combined experimental and computational approach. The decomposition kinetics is researched via differential scanning calorimetry and thermogravimetric analysis using Flynn-Wall-Ozawa, Kissinger, and Starink methods. The growth was found to be influenced by the factors of reaction temperature, protective gas, and time. And microstructural and thermal characterizations were performed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and differential scanning calorimetry. Decomposition of cupric tartrate at different temperatures was simulated by density functional theory calculations under the generalized gradient approximation. High crystalline Cu nanocrystals without floccules were obtained from thermal decomposition of cupric tartrate at 271°C for 8 h under Ar. This general approach paves a way to controllable synthesis of Cu nanocrystals with high purity. |
| Databáze: | OpenAIRE |
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