Abstract
Direct deposition of graphene layers on the flexible glass fiber surface to form the three-dimensional (3D) core-shell structures is offered using a two-heating reactor chemical vapor deposition system. The two-heating reactor is utilized to offer sufficient, well-proportioned floating C atoms and provide a facile way for low-temperature deposition. Graphene layers, which are controlled by changing the growth time, can be grown on the surface of wire-type glass fiber with the diameter from 30 nm to 120 um. The core-shell graphene/glass fiber deposition mechanism is proposed, suggesting that the 3D graphene films can be deposited on any proper wire-type substrates. These results open a facile way for direct and high-efficiency deposition of the transfer-free graphene layers on the low-temperature dielectric wire-type substrates.PACS81.05.U-; 81.07.-b; 81.15.Gh
Highlights
Graphene as typical sp2 hybridized carbon has been attracting extensive scientific interest from both experimental and theoretical communities in the recent years
A relatively uniform color is appreciated, and no rippled or wrinkled structures are detected on each glass fiber
It should be stressed that the graphene films can be grown on the surface of every wire-type glass fiber with the diameter from 30 nm to 2 um
Summary
Graphene as typical sp hybridized carbon has been attracting extensive scientific interest from both experimental and theoretical communities in the recent years. Different carbon allotropes or complex compound structures, e.g., carbon nanotubes [13,15], carbon nanofibers [26], graphene networks [14,16,17,23], and carbon-based hybrid nanostructures [12,25], have been used to prepare the 3D nanostructured carbon materials. We report a simple two-heating reactor CVD method for the direct formation of self-assembled flexible 3D core-shell graphene/glass fiber. This method presents us a promising transfer-free technique for fabrication 3D graphene nanostructures. Our new method involves a single-step, lower-temperature (600°C), yet its properties including the conductivity are comparable to those of CVD graphene foam
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