Artículos de revistas
Nanostructured Few-Layer Graphene with Superior Optical Limiting Properties Fabricated by a Catalytic Steam Etching Process
Fecha
2013-05-14Registro en:
Sun, Zhenyu ; Dong, Ningning ; Xie, Kunpen ; Xia, Wei ; König, Dennis ; et al.; Nanostructured Few-Layer Graphene with Superior Optical Limiting Properties Fabricated by a Catalytic Steam Etching Process; American Chemical Society; Journal of Physical Chemistry C; 117; 22; 14-5-2013; 11811-11817
1932-7447
Autor
Sun, Zhenyu
Dong, Ningning
Xie, Kunpen
Xia, Wei
König, Dennis
Tharamani, Chikka Nagaiah
Sanchez, Miguel Dario
Ebbinghaus, Petra
Erbe, Andreas
Zhang, Xiaoyan
Ludwig, Alfred
Schuhmann, Wolfgang
Wang, Jun
Muhler, Martin
Resumen
Tailoring the morphology and structure of graphene can result in novel properties for advanced applications. Here, we demonstrate the fabrication of nanostructured few-layer graphene through a mild etching process via catalytic steam gasification of carbon by Fe nanoparticles (NPs). Controlling the reaction temperature, steam concentration, and the loading density of the NPs enables the finetuning of the etching level of graphene. Well-defined nanotrenches with a width of less than 25 nm were formed by channeling of the catalytic NPs. Etching caves and quasisemicircular etched edges were observed as well. The nonlinear optical properties of the resulting nanostructured graphene were studied under a 532 nm nanosecond pulse laser through an open-aperture apparatus. At the same level of the linear extinction coefficient, it exhibits superior optical limiting performance in comparison with pristine graphene and C60, showing a large potential in nanophotonic devices. This enhancement is ascribed to the defects formed by etching resulting in a finite band gap in nanostructured graphene.