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Issue 38, 2018
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Spitzer shaped ZnO nanostructures for enhancement of field electron emission behaviors

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Abstract

We observed enhanced field emission (FE) behavior for spitzer shaped ZnO nanowires synthesized via a hydrothermal approach. The spitzer shaped and pointed tipped 1D ZnO nanowires of average diameter 120 nm and length ∼5–6 μm were randomly grown over an ITO coated glass substrate. The turn-on field (Eon) of 1.56 V μm−1 required to draw a current density of 10 μA cm−2 from these spitzer shaped ZnO nanowires is significantly lower than that of pristine and doped ZnO nanostructures, and MoS2@TiO2 heterostructure based FE devices. The orthodoxy test that was performed confirms the feasibility of a field enhancement factor (βFE) of 3924 for ZnO/ITO emitters. The enhancement in FE behavior can be attributed to the spitzer shaped nanotips, sharply pointed nanotips and individual dispersion of the ZnO nanowires. The ZnO/ITO emitters exhibited very stable electron emission with average current fluctuations of ±5%. Our investigations suggest that the spitzer shaped ZnO nanowires have potential for further improving in electron emission and other functionalities after forming tunable nano-hetero-architectures with metal or conducting materials.

Graphical abstract: Spitzer shaped ZnO nanostructures for enhancement of field electron emission behaviors

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Publication details

The article was received on 17 Apr 2018, accepted on 25 May 2018 and first published on 13 Jun 2018


Article type: Paper
DOI: 10.1039/C8RA03282C
Citation: RSC Adv., 2018,8, 21664-21670
  • Open access: Creative Commons BY license
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    Spitzer shaped ZnO nanostructures for enhancement of field electron emission behaviors

    P. R. Chikate, P. K. Bankar, R. J. Choudhary, Y. Ma, S. I. Patil, M. A. More, Deodatta M. Phase, P. M. Shirage and R. S. Devan, RSC Adv., 2018, 8, 21664
    DOI: 10.1039/C8RA03282C

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