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- Title
High efficient electron field emission from rGO conformally coated NiO nanoflakes architecture.
- Authors
Jayalakshmi, G.; Saravanan, K.; Panigrahi, B. K.; Magudapathy, P.
- Abstract
In the study, we report the facile synthesis of reduced graphene oxide (rGO) conformally coated vertically aligned, densely packed NiO nanoflakes (NFs) architecture for high efficient electron field emission applications. The NiO NFs architecture was grown on the Si substrate by a simple hydrothermal method, followed by decoration with rGO by drop casting method. The grazing incidence X-ray diffraction measurements reveal the formation of cubic structured NiO. The grown NiO NFs architecture is in better stoichiometry as evidenced from the resonant Rutherford backscattering spectrometry measurements. The rGO conformally coated NiO NFs (GNiO NFs) shows higher mobility and lower sheet resistance in comparison with its counterparts. X-ray absorption near edge structure analyses at O K-edge reveals the increase in unoccupied density of states due to the charge transfer from NiO to rGO. The rGO conformally coated NiO NFs architecture exhibits low turn-on voltage and enhanced field emission (FE) current as compared to the NiO NFs architecture. The observed low turn-on voltage and enhanced FE current for the GNiO NFs architecture is ascribed to the synergistic effect of addition of rGO as the conductive channels, which results in better charge transport and the enhanced field emission current characteristics.
- Subjects
GRAPHENE oxide; ELECTRON field emission; CHEMICAL synthesis; X-ray absorption near edge structure; CHARGE transfer
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 17, p14689
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-9605-z