Compressed glassy carbon: An ultrastrong and elastic interpenetrating graphene network.
Compressed glassy carbon: An ultrastrong and elastic interpenetrating graphene network.
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压缩玻碳：超强弹性互穿石墨烯网络
DOI：
10.1126/sciadv.1603213
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发表时间：
2017-06
期刊：
影响因子：
13.6
通讯作者：
Tian Y
中科院分区：
文献类型：
--
作者：
Hu M;He J;Zhao Z;Strobel TA;Hu W;Yu D;Sun H;Liu L;Li Z;Ma M;Kono Y;Shu J;Mao HK;Fei Y;Shen G;Wang Y;Juhl SJ;Huang JY;Liu Z;Xu B;Tian Y
玻璃碳的压缩形成一系列轻质、超强、坚硬、弹性和导电的碳。碳具有sp2和sp3键合状态的独特能力，产生了一系列物理属性，包括优异的机械和电气性能。我们发现，一系列的轻质，超强，硬，弹性，导电碳压缩后，在不同的温度下sp2杂化玻璃碳回收。压缩诱导石墨烯片通过sp3节点的局部屈曲，形成纳米尺度上的长程无序和短程有序的互穿石墨烯网络。压缩的玻璃碳具有非凡的比压缩强度，超过常用陶瓷的两倍，同时表现出强大的弹性恢复响应局部变形。这种类型的碳是一种最佳的超轻，超强材料，适用于广泛的多功能应用，合成方法显示出获得具有特殊性能的全新亚稳材料的潜力。
The compression of glassy carbon forms a series of lightweight, ultrastrong, hard, elastic, and conductive carbons. Carbon’s unique ability to have both sp2 and sp3 bonding states gives rise to a range of physical attributes, including excellent mechanical and electrical properties. We show that a series of lightweight, ultrastrong, hard, elastic, and conductive carbons are recovered after compressing sp2-hybridized glassy carbon at various temperatures. Compression induces the local buckling of graphene sheets through sp3 nodes to form interpenetrating graphene networks with long-range disorder and short-range order on the nanometer scale. The compressed glassy carbons have extraordinary specific compressive strengths—more than two times that of commonly used ceramics—and simultaneously exhibit robust elastic recovery in response to local deformations. This type of carbon is an optimal ultralight, ultrastrong material for a wide range of multifunctional applications, and the synthesis methodology demonstrates potential to access entirely new metastable materials with exceptional properties.