Guangjun Cheng, Brent A. Sperling, James E. Maslar, Curt A. Richter, Angela R. Hight Walker
We present an investigation on tearing and scrolling of the transferred graphene on a Si/SiO2 substrate. Graphene grown by chemical vapor deposition (CVD) is transferred onto a Si/SiO2 substrate using a wet polymer-mediated process. Upon the removal of polymer and drying, tearing of graphene occurs preferably along the armchair or zigzag directions. Scrolls are produced from the ruptured graphene. Optical microscopy and scanning electron microscopy show that the morphology of the isolated scrolls is similar to that of scrolls formed from exfoliated graphene. Raman spectroscopy reveals that the scrolls have a more pronounced D peak than graphene and that the graphene layers in the scrolls are non-AB stacked. Due to the variations in the number of graphene layers and in the rotation angle among the graphene layers, the scrolls display a large variation in the integrated intensity of G and G' peaks at different scroll locations. The scroll field-effect-transistor (FET) device exhibits an ambipolar behavior, resembling the graphene FET device. The tearing and scrolling of transferred graphene can also take place on a metal surface. This work demonstrates the possibility of large scale fabrication of carbon scrolls using CVD-grown graphene on various substrates and paves the way for advancing their applications in materials storage, energy storage and nano-mechanical devices.
, Sperling, B.
, Maslar, J.
, Richter, C.
and Hight, A.
Tearing and scrolling of transferred graphene, Carbon, [online], https://doi.org/10.1016/j.carbon.2014.04.076
(Accessed March 2, 2024)