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>Strengthening of Ceramic-based Artificial Nacre via Synergistic Interactions of 1D Vanadium Pentoxide and 2D Graphene Oxide Building Blocks
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Strengthening of Ceramic-based Artificial Nacre via Synergistic Interactions of 1D Vanadium Pentoxide and 2D Graphene Oxide Building Blocks
Nature has evolved hierarchical structures of hybrid materials with excellent mechanical properties. Inspired by nacre’s architecture, a ternary nanostructured composite has been developed, wherein stacked lamellas of 1D vanadium pentoxide nanofibres, intercalated with water molecules, are complemented by 2D graphene oxide (GO) nanosheets. The components self-assemble at low temperature into hierarchically arranged, highly flexible ceramic-based papers. The papers’ mechanical properties are found to be strongly influenced by the amount of the integrated GO phase. Nanoindentation tests reveal an out-of-plane decrease in Young’s modulus with increasing GO content. Furthermore, nanotensile tests reveal that the ceramic-based papers with 0.5 wt% GO show superior in-plane mechanical performance, compared to papers with higher GO contents as well as to pristine V[subscript 2]O[subscript 5] and GO papers. Remarkably, the performance is preserved even after stretching the composite material for 100 nanotensile test cycles. The good mechanical stability and unique combination of stiffness and flexibility enable this material to memorize its micro- and macroscopic shape after repeated mechanical deformations. These findings provide useful guidelines for the development of bioinspired, multifunctional systems whose hierarchical structure imparts tailored mechanical properties and cycling stability, which is essential for applications such as actuators or flexible electrodes for advanced energy storage.
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机译:大自然已经进化出具有优异机械性能的混合材料的分层结构。受珍珠层结构启发,开发了一种三元纳米结构复合材料,其中,一维五氧化二钒纳米纤维的叠层薄板插入了水分子,并辅以二维氧化石墨烯(GO)纳米片。这些组件在低温下会自动组装成分层排列的高柔韧性陶瓷基纸。发现纸张的机械性能受GO相积分量的强烈影响。纳米压痕测试显示,随着GO含量的增加,杨氏模量出现面外下降。此外,纳米拉伸试验表明,与GO含量较高的纸张以及原始的V [下标2] O [下标5]和GO纸相比,GO含量为0.5 wt%的陶瓷纸显示出优异的面内机械性能。值得注意的是,即使将复合材料拉伸了100纳秒的测试周期,仍可以保持性能。良好的机械稳定性以及刚度和柔韧性的独特组合使这种材料能够在反复机械变形后记忆其微观和宏观形状。这些发现为开发具有生物启发性的多功能系统提供了有用的指导,其分级结构赋予了定制的机械性能和循环稳定性,这对于诸如执行器或用于先进能量存储的柔性电极之类的应用至关重要。
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