| Autor: |
Changqing Guo, Zuo-Guang Ye, Junwei Zhang, Zhongqiang Hu, Ruobo Peng, Ziyao Zhou, Yanan Zhao, Yongqi Dong, Zhuangde Jiang, Houbing Huang, Dan Xian, Jiawang Hong, Guohua Dong, Ming Liu, Qi Mao, Bin Peng, Yong Peng, Zhenlin Luo, Zhiguang Wang, Wei Ren, Haijun Wu, Haixia Liu, Xueyun Wang, Yue Hu |
| Rok vydání: |
2021 |
| Předmět: |
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| DOI: |
10.21203/rs.3.rs-779080/v1 |
| Popis: |
Oxide nano-springs have attracted many research interests because of their anti-corrosion, high-temperature tolerance, oxidation resistance, and enhanced-mechanic-response from unique helix structures, enabling various nano-manipulators, nano-motors, nano-switches, sensors, and energy harvesters. However, preparing oxide nano-springs is a challenge for their intrinsic nature of lacking elasticity. Here, we developed an approach for preparing self-assembled, epitaxial, ferroelectric nano-springs with built-in strain due to the lattice mismatch in freestanding La0.7Sr0.3MnO3/BaTiO3 (LSMO/BTO) bilayer heterostructures. We find that these LSMO/BTO nano-springs can be extensively pulled or pushed up to their geometry limits back and forth without breaking, exhibiting super-scalability with full recovery capability. The phase-field simulations reveal that the excellent scalability originates from the continuous ferroelastic domain structures, resulting from twisting under co-existing axial and shear strains. In addition, the oxide hetero-structural springs exhibit strong resilience due to the limited plastic deformation nature and the built-in strain between the bilayers. This discovery provides an alternative way for preparing and operating functional oxide nano-springs that can be applied to various technologies. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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