Development of an ultra-thin film comprised of a graphene membrane and carbon nanotube vein support
Development of an ultra-thin film comprised of a graphene membrane and carbon nanotube vein support
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开发由石墨烯膜和碳纳米管静脉支架组成的超薄膜
DOI：
10.1038/ncomms3920
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发表时间：
2013-12-01
影响因子：
16.6
通讯作者：
Jiang, Kaili
中科院分区：
文献类型：
--
作者：
Lin, Xiaoyang;Liu, Peng;Jiang, Kaili
石墨烯具有上级的机械、热学、光学和电学性能，引起了人们极大的兴趣。考虑到石墨烯只有一个原子厚，并且晶界处的机械强度降低，大面积悬浮化学气相沉积石墨烯的制造仍然是一个挑战。在这里，我们报告了超薄独立的碳纳米管/石墨烯混合膜的制造，灵感来自自然界中发现的静脉膜结构。这种平方厘米大小的杂化膜可以实现大面积单层化学气相沉积石墨烯覆盖到多孔脉状碳纳米管网络上。石墨烯悬浮在碳纳米管网格上的脉膜状杂化膜具有优异的力学性能、光学透明性和良好的导电性。超薄混合膜具有接近90%的电子透明度，这使其成为真空电子学中的理想栅电极和透射电子显微镜中的高性能样品支撑。
Graphene, exhibiting superior mechanical, thermal, optical and electronic properties, has attracted great interest. Considering it being one-atom-thick, and the reduced mechanical strength at grain boundaries, the fabrication of large-area suspended chemical vapour deposition graphene remains a challenge. Here we report the fabrication of an ultra-thin free-standing carbon nanotube/graphene hybrid film, inspired by the vein–membrane structure found in nature. Such a square-centimetre-sized hybrid film can realize the overlaying of large-area single-layer chemical vapour deposition graphene on to a porous vein-like carbon nanotube network. The vein–membrane-like hybrid film, with graphene suspended on the carbon nanotube meshes, possesses excellent mechanical performance, optical transparency and good electrical conductivity. The ultra-thin hybrid film features an electron transparency close to 90%, which makes it an ideal gate electrode in vacuum electronics and a high-performance sample support in transmission electron microscopy.