Abstract
In this paper we report, large scale synthesis of α and β-NiMoO4 by a facile hydrothermal method and we observed that urea plays important role on the growth of β-NiMoO4 nanosheets. We have also carried out field emission (FE) investigations of α and β-NiMoO4 at a base pressure of ∼1×10−8mbar. The obtained turn-on field at emission current density of 1μA/cm2 for β-NiMoO4 nanosheets and α −NiMoO4 is 1.3V/μm and 2.2V/μm respectively were observed. The maximum field emission current density of 1.006mA/cm2at an applied electric field of 2.7V/μm was achieved for β-NiMoO4 nanosheets. Furthermore, we found that the β-NiMoO4 nanosheets possess good field emission performance compared to α-NiMoO4. The results indicate that NiMoO4can be used as a promising material in FE applications with possibility of tuning field emission performance by controlling the phase.
Published Version
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