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Title: Facile and single step synthesis of three dimensional reduced graphene oxide-NiCoO 2 composite using microwave for enhanced electron field emission properties
Authors: Kumar R.
Singh R.K.
Singh A.K.
Vaz A.R.
Rout C.S.
Moshkalev S.A.
Keywords: Field emission
Mixed transition metal oxide
Reduced graphene oxide nanosheets
Issue Date: 2017
Citation: 16
Abstract: We report the enhanced field emission properties of three-dimensional (3D) mixed transition metal oxide with reduced graphene oxide nanosheets (rGO-NSs) using a simple and fast synthesis route. The rGO-NSs with different/mixed transition metal oxide (rGO-M x O y ) (M x O y �=�CoO, NiO and NiCoO 2 ) composite has been synthesized for comparative studies for the electron field emission properties. The various rGO-M x O y composite materials were synthesized by microwave irradiation using soild precursor powder. The electron field emission properties were studied for all the samples as rGO-NSs, rGO-CoO, rGO-NiO and 3D rGO-NiCoO 2 composite. It was found that specially, rGO-NiCoO 2 composite shows the enhanced field emission performance due to synergic effect of mixed transition metal oxide as NiCoO 2 nanoparticles with rGO-NSs and also the proper anchoring of NiCoO 2 nanoparticles on rGO-NSs. The attachment of NiCoO 2 mixed transition metal oxide with rGO-NSs exhibited lower turn-on field, lower threshold field, larger field enhancement factor and stable emission current stability as compared with those of the rGO-NSs, rGO-CoO and rGO-NiO composite. The surface microstructural analysis and morphology were probed by XRD, scanning and Raman. We suggest that anchoring of binary metal oxide nanoparticles on rGO-NSs could be exploited for the development of efficient field emitters. � 2017 Elsevier B.V.
Appears in Collections:Research Publications

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