Structured Graphene - Spinnable CNT and Beyond
Graphene is attracting immense interest due to its exceptional properties. Many potential applications such as nano-scale electronic devices and sensors need graphene structures with well-controlled feature size and tuneable electronic properties.
A range of methods have been used to produce patterned or structured graphene, including photolithography, micro-contact printing, direct growth of graphene on pre-patterned catalyst substrates etc. We've developed a simple and efficient process to produce freestanding graphene membranes patterned and reinforced with highly aligned 'Directly Spinnable Carbon Nanotube web' (DSCNT). Cu TEM grids with different grid patterns alone and in conjunction with DSCNT and copper foil have been used to create a range of self supporting graphene structures.
TEM results show that 3 layers of Graphene were achieved with DSCNT webs (7 walls) are seen to have blended into the Graphene surface structure. Cu TEM grids on a copper substrate followed by annealing results in its edges are in close contact and firmly bonded to the substrate. We found that Graphene grown on the TEM / copper substrate follows the geometry of the combined structure.