Spring-Like Pseudoelectroelasticity of Monocrystalline Cu2S Nanowire
| Autor: | Hongtao Zhang, Zhe Shi, Kaihao Yu, Kuibo Yin, Feng Xu, Xin-Xing Peng, Chia-Chin Chen, Hui Dong, Qiubo Zhang, Litao Sun, Haimei Zheng, Ilia Valov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Nanowire Nucleation Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic units 0104 chemical sciences Monocrystalline silicon Chemical physics Transmission electron microscopy Electric field Fast ion conductor General Materials Science 0210 nano-technology High-resolution transmission electron microscopy |
| Zdroj: | Nano Letters. 18:5070-5077 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.8b01914 |
| Popis: | Prediction from the dual-phase nature of superionic conductors—both solid and liquid-like—is that mobile ions in the material may experience reversible extraction–reinsertion by an external electric field. However, this type of pseudoelectroelasticity has not been confirmed in situ, and no details on the microscopic mechanism are known. Here, we in situ monitor the pseudoelectroelasticity of monocrystalline Cu2S nanowires (NWs) using transmission electron microscopy (TEM). Specifically, we reveal the atomic scale details including phase transformation, migration and redox reactions of Cu+ ions, nucleation, growth, as well as spontaneous shrinking of Cu protrusion. Caterpillar-diffusion-dominated deformation is confirmed by the high-resolution transmission electron microscopy (HRTEM) observation and ab initio calculation, which can be driven by either an external electric field or chemical potential difference. The observed spring-like behavior was creatively adopted for electric nanoactuators. Our finding... |
| Databáze: | OpenAIRE |
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