Solution-Processed Growth of Graphene-SWCNT Hybrid Material
Covalently bonded graphene/single-walled carbon nanotube (SWCNT) hybrid materials exhibit the excellent electrical conductivities and large surface areas of its individual components while extending their properities to three dimensions. However, current methods to fabricate graphene-SWCNT are energy intensive and slow, requiring high-vacuum electron beam deposition of the catalyst and catalyst support layer. This project develops a facile, scalable, solution-processed method to deposit iron and aluminum oxide, the catalyst and catalyst-support layer, onto CVD-grown graphene. Diameter-controlled iron oxide nanoparticles are synthesized and are attached to the graphene using PTCA-functionalization. Liquid-phase deposition of alumoxane nanoparticles creates the catalyst support layer. The use of alumoxane and iron nanoparticles for catalytic growth is an inexpensive approach to graphene-SWCNT production for exciting applications in energy storage and nanotechnology.