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Vertically-aligned CNT films: VACNT/resins, rubbers, papers

Vertically-aligned CNT films transferred on resins, rubbers, papers


 Vertically-aligned CNT films cannot be directly grown on a polymer film or sheet, because any polymer has a melting point that is much lower than the CNT growth temperature. However, VACNT film grown on an inorganic substrate can be transferred to a polymer film by applying a thermal transfer method.

 After the transfer process, the top end of each VACNT on the organic substrate is caught strongly by the polymer film due to a plastic strain, and the bottom end of each VACNT on the organic substrate is easily detached from the substrate. As a result, the vertically-aligned structure of the CNTs transferred on a polymer film is still maintained.

 Thanks to the flexibility of a polymer, applications of VACNT to complicated objects or devices will be possible.

■VACNT/Polymer


VACNT/polyethylene film VACNT transferred to a polyethylene film. Because the surface of a VACNT film has a magic-tape-like structure at nanoscale, the film can be stuck on a smooth surface (such as a white board).
VACNT/polyethylene film SEM image of VACNT on a polyethylene film showing that the vertically-aligned structure is maintained.
VACNT/Teflon sheet
VACNT transferred on a Teflon sheet

■VACNT/Rubber

 Because the VACNT has a good flexibility and elasticity, the VACNT film transferred on a rubber sheet will not crack even if the rubber sheet is stretched or shrank.

VACNT/ubber film
VACNT transferred on a rubber film deformations of
VACNT/rubber sheet VACNT grown on a Si substrate (right-top) has been transferred to a rubber sheet (right-bottom), showing a good conductivity.

■VACNT/Paper

 VACNT can also be transferred on a paper, which has a high handling ability.

VACNT/paper
VACNT transferred on a paper
VACNT/paper
Cross-section SEM image of cut VACNT/paper
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