One-step room temperature rapid synthesis of Cu2Se nanostructures, phase transformation, and formation of p-Cu2Se/p-Cu3Se2heterojunctions
| Autor: | Jing Zhang, Yanxing Zhao, Guangzhi Zhang, Xiaoting Li, Ningning Ba, Lijian Bie, Hanjie Xie, Wenjun Zheng, Lianjie Zhu |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Band gap Composite number Heterojunction Nanotechnology 02 engineering and technology General Chemistry Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention Tetragonal crystal system Chemical engineering law Phase (matter) General Materials Science Calcination 0210 nano-technology Nanosheet |
| Zdroj: | CrystEngComm. 18:5202-5208 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c6ce00370b |
| Popis: | A tetragonal Cu2Se film containing a well-aligned nanosheet array with scattered 3D flower-like microstructures on top was synthesized for the first time by a rapid one-step low-energy route, which is beneficial for large scale industrial production due to savings in energy, time and expensive instruments. Phase transformation occurred after scraping the film from the Cu substrate, and heating or grinding the Cu2Se powder in air. The Cu2Se/Cu3Se2 composite containing p-Cu2Se/p-Cu3Se2 heterojunctions was obtained by simply calcining the Cu2Se in air at 300 °C for 3 h. The composite has enhanced gas sensing properties towards acetone gas and a lower band gap energy compared to Cu2Se. |
| Databáze: | OpenAIRE |
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