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Effective hybrid graphene/carbon nanotubes field emitters by electrophoretic deposition
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View: Figures


Image of FIG. 1.
FIG. 1.

SEM images of 2.5, 5, and 10 min graphene/CNT hybrid samples by EPD. Left column shows lower magnification at 1000×, while right column shows higher magnifications of samples.

Image of FIG. 2.
FIG. 2.

(a) Cross-section SEM images showing morphology with multiple protrusions and a vertically aligned CNT-strapped graphene sheet (white arrow) (b) Hybrid graphene/CNT film by filtration at 50% graphene in Ref. shows a flatter overall surface morphology. Reprinted with permission from U. Khan , Carbon , 2825 (2010). Copyright 2010 Elsevier.

Image of FIG. 3.
FIG. 3.

SEM images of graphene-only samples at (a) low and (b) high magnification and CNT-only samples at (c) low and (d) high magnification. Figures (a) and (b) are reprinted with permission from A. T. T. Koh , Appl. Phys. Lett. , 183107 (2012). Copyright 2012 American Institute of Physics.

Image of FIG. 4.
FIG. 4.

TEM images showing (a) high crystalline quality graphene (b) CNT used in the experiments.

Image of FIG. 5.
FIG. 5.

I-V plots of graphene/CNT hybrid, graphene-only and CNT-only emitters.

Image of FIG. 6.
FIG. 6.

F-N plots of graphene/CNT hybrid emitters.


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Scitation: Effective hybrid graphene/carbon nanotubes field emitters by electrophoretic deposition