Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition
Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition
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通过化学气相沉积生长的三维柔性导电互连石墨烯网络
DOI：
10.1038/nmat3001
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发表时间：
2011-06-01
期刊：
影响因子：
41.2
通讯作者：
Cheng, Hui-Ming
中科院分区：
文献类型：
--
作者：
Chen, Zongping;Ren, Wencai;Cheng, Hui-Ming
将单个二维石墨烯片（1-3）集成到宏观结构中对于石墨烯的应用是必不可少的。最近已经使用化学衍生的石墨烯片制造了一系列石墨烯基复合材料（4-6）和宏观结构（7-11）。然而，由于化学衍生的石墨烯片的低质量和/或高片间结接触电阻，这些复合材料和结构具有差的导电性。在这里，我们报告了直接合成的三维泡沫状石墨烯宏观结构，我们称之为石墨烯泡沫（GFs），通过模板导向化学气相沉积。GF由互连的柔性石墨烯网络组成，作为电荷载流子的快速传输通道，以实现高电导率。即使GF负载低至类似于0.5wt%，GF/聚（二甲基硅氧烷）复合材料也显示出类似于10 S cm（-1）的非常高的电导率，这类似于比化学衍生的石墨烯基复合材料高6个数量级（4）。使用这种独特的网络结构和GF出色的电气和机械性能，作为一个例子，我们展示了GF/聚（二甲基硅氧烷）复合材料的巨大潜力，用于柔性，可折叠和可拉伸的导体（12）。
Integration of individual two-dimensional graphene sheets(1-3) into macroscopic structures is essential for the application of graphene. A series of graphene-based composites(4-6) and macroscopic structures(7-11) have been recently fabricated using chemically derived graphene sheets. However, these composites and structures suffer from poor electrical conductivity because of the low quality and/or high inter-sheet junction contact resistance of the chemically derived graphene sheets. Here we report the direct synthesis of three-dimensional foam-like graphene macrostructures, which we call graphene foams (GFs), by template-directed chemical vapour deposition. A GF consists of an interconnected flexible network of graphene as the fast transport channel of charge carriers for high electrical conductivity. Even with a GF loading as low as similar to 0.5 wt%, GF/poly(dimethyl siloxane) composites show a very high electrical conductivity of similar to 10 S cm(-1), which is similar to 6 orders of magnitude higher than chemically derived graphene-based composites(4). Using this unique network structure and the outstanding electrical and mechanical properties of GFs, as an example, we demonstrate the great potential of GF/poly(dimethyl siloxane) composites for flexible, foldable and stretchable conductors(12).