Wallace Steaphan M, Subramani Thiyagu, Jevasuwan Wipakorn, Fukata Naoki
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, 305-0044, Japan.
J Nanosci Nanotechnol. 2021 Sep 1;21(9):4949-4954. doi: 10.1166/jnn.2021.19329.
Graphene sheets displaying partial crystallinity and nanowire structures were formed on a silicon substrate with silicon nanowires by utilizing an amorphous carbon source. The carbon source was deposited onto the silicon nanostructured substrate by breaking down a polymer precursor and was crystallized by a nickel catalyst during relatively low temperature inert gas annealing. The resulting free-standing graphene-based material can remain on the substrate surface after catalyst removal or can be removed as a separate film. The film is flexible, continuous, and closely mimics the silicon nanostructure. This follows research on similar solid carbon precursor derived semi-crystalline graphene synthesis procedures and applies it to complex silicon nanostructures. This work examined the progression of the carbon, finding that it migrates through the thin film catalyst and forms the graphene only on the other side, and that the process can successfully be used to form 3D shaped graphene films. Semi-crystalline graphene has the possible application of being flexible transparent electrodes, and the 3D shaping opens the possibility of more complex configurations and applications.
通过利用非晶碳源，在带有硅纳米线的硅衬底上形成了具有部分结晶度和纳米线结构的石墨烯片。碳源通过分解聚合物前驱体沉积到硅纳米结构衬底上，并在相对低温的惰性气体退火过程中由镍催化剂结晶。所得的独立式石墨烯基材料在去除催化剂后可保留在衬底表面，也可作为单独的薄膜被去除。该薄膜具有柔韧性、连续性，并且紧密模仿硅纳米结构。这遵循了对类似的由固体碳前驱体衍生的半结晶石墨烯合成程序的研究，并将其应用于复杂的硅纳米结构。这项工作研究了碳的演变过程，发现它穿过薄膜催化剂并仅在另一侧形成石墨烯，并且该过程可以成功用于形成三维形状的石墨烯薄膜。半结晶石墨烯有可能应用于柔性透明电极，而三维成型为更复杂的配置和应用开辟了可能性。
