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Issue 20, 2014
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Highly efficient field emission from large-scale and uniform monolayer graphene sheet supported on patterned ZnO nanorod arrays

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Abstract

A graphene/patterned ZnO (G/PZO) nanorod array composite was successfully fabricated by using the colloidal nanosphere monolayer templating strategy. Compared with graphene/compact ZnO (G/CZO) nanorod arrays, the G/PZO nanorod array composite exhibited a highly efficient and stable field emission with a low turn-on field. The field emission had a strong dependence on the density and the inter-distance of the emitters. By changing the diameter of polystyrene (PS) colloidal nanospheres, optimal emitter inter-distance was obtained. Graphene supported on ZnO nanorod arrays, patterned by an 886 nm PS colloidal nanosphere monolayer, displayed the best field emission with a turn-on electric field of only 6.4 V μm−1 and the field enhancement factor β was 1158. The K point in the Fowler–Nordheim plot demonstrated the electron tunneling mechanism took place in this composite material. The cyclic experiment showed that the field emission of the G/PZO nanorod array composite was of high stability.

Graphical abstract: Highly efficient field emission from large-scale and uniform monolayer graphene sheet supported on patterned ZnO nanorod arrays

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Publication details

The article was received on 02 Feb 2014, accepted on 19 Mar 2014 and first published on 19 Mar 2014


Article type: Paper
DOI: 10.1039/C4TC00219A
J. Mater. Chem. C, 2014,2, 3965-3971

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    Highly efficient field emission from large-scale and uniform monolayer graphene sheet supported on patterned ZnO nanorod arrays

    L. Zhang, X. Liu, Z. Lian, X. Wang, G. Shen, D. Shen and Q. Yan, J. Mater. Chem. C, 2014, 2, 3965
    DOI: 10.1039/C4TC00219A

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