Direct fabrication of carbon nanotube-graphene hybrid films by a blown bubble method

Hybridization of carbon nanotubes （CNT） with graphene provides a promising means of integrating the attributes of both materials, thereby enabling widespread application. Here, we present a method to directly assemble hybrid CNT- graphene films by a blown bubble method combined with selective substrate annealing. We use polymethylmethacrylate （PMMA） as the polymeric matrix to blow bubbles containing self-assembled multi-walled CNT arrays, and then transform the bubble film into a CNT-graphene hybrid film by thermal annealing on a Cu substrate; PMMA serves as the carbon source for growing single to few-layer graphene among the CNT network until a continuously hybridized structure is formed. Compared to the bare （non-hybridized） CNT networks, the hybrid films exhibit improved electrical conductivity and structural integrity. Our method also enables the fabrication of a multi-walled CNT-Si solar cell, which has high power conversion efficiency, through the assembly of hybrid CNT-graphene structures.

有 graphene 的碳 nanotubes (CNT ) 的杂交提供集成两材料的属性的一个有希望的工具，从而创新的普遍申请。这里，我们在场直接由一个吹的水泡方法装配混合 CNT-graphene 电影的一个方法与选择底层退火结合了。我们把 polymethylmethacrylate (PMMA ) 用作聚合矩阵吹包含自我装配的多围的 CNT 数组的水泡，然后由在 Cu 底层上的热退火把水泡电影转变成一部 CNT-graphene 混合电影；PMMA 为在 CNT 网络之中对很少层 graphene 变得单个直到担任碳来源一连续地， hybridized 结构被形成。比作赤裸(non-hybridized ) CNT 联网，混合电影展览改进了电的电导率和结构的完整。我们的方法也启用一节多围的 CNT-Si 太阳能电池的制造，它有高力量变换效率，通过混合 CNT-graphene 结构的集会。