Department of Materials Science and Engineering, College of Engineering, Peking University , Beijing 100871, PR China.
National Center for Nanoscience and Technology , 11 Beiyitiao Street, Zhongguancun, Beijing 100190, PR China.
Nano Lett. 2016 Aug 10;16(8):4917-24. doi: 10.1021/acs.nanolett.6b01490. Epub 2016 Jul 18.
We use a blown-bubble method to assemble Cu nanowires and in situ fabricate graphene-based one-dimensional heterostructures, including versatile sausage-like configurations consisting of multilayer graphene nanotubes (GNTs) filled by single or periodically arranged Cu nanoblocks (CuNBs). This is done by first assembling Cu nanowires among a polymer-based blown-bubble film (BBF) and then growing graphene onto the nanowire substrate using the polymer matrix as a solid carbon source by chemical-vapor deposition. The formation of sausage-like GNT@CuNB nanostructures is due to the partial melting and breaking of embedded Cu nanowires during graphene growth, which is uniquely related to our BBF process. We show that the GNT skin significantly slows the oxidation process of CuNBs compared with that of bare Cu nanowires, and the presence of stuffed CuNBs also reduces the linear resistance along the GNTs. The large-scale assembled graphene-based heterostructures achieved by our BBF method may have potential applications in heterojunction electronic devices and high-stability transparent conductive electrodes.
我们使用吹泡法组装 Cu 纳米线，并在原位制备基于石墨烯的一维异质结构，包括由多层石墨烯纳米管（GNTs）填充的各种香肠状结构，这些 GNTs 内填充有单根或周期性排列的 Cu 纳米块（CuNBs）。具体做法是：首先在聚合物基吹泡膜（BBF）中组装 Cu 纳米线，然后通过化学气相沉积，利用聚合物基质作为固态碳源在纳米线基底上生长石墨烯。香肠状 GNT@CuNB 纳米结构的形成是由于在石墨烯生长过程中嵌入的 Cu 纳米线发生部分熔化和断裂，这与我们的 BBF 工艺密切相关。我们发现，与裸露的 Cu 纳米线相比，GNT 外皮显著减缓了 CuNBs 的氧化过程，而填充的 CuNBs 也降低了 GNTs 中的线性电阻。我们的 BBF 方法实现的大规模组装的基于石墨烯的异质结构可能在异质结电子器件和高稳定性透明导电电极中有潜在应用。
