Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 686, Issue -, Pages 588-592Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.06.084
Keywords
Graphene; TiO2; Diamond-like carbon film; Electrochemical deposition; Ultraviolet light; Field emission
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Funding
- Natural Science Foundation of China [51105186]
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The graphene-TiO2/diamond-like carbon (G-TiO2/DLC) nanocomposite films were prepared on silicon substrates by a simple ultraviolet (UV) light assisted electrochemical deposition process using N, N-dimethylformamide (DMF) as carbon source and TiO2 nanoparticles/graphene sheets as incorporated reagents. The results show that the TiO2 and graphene sheets are uniformly dispersed into the DLC matrix. The UV-light illumination not only affects the morphology of the films, but also promotes the field emission properties, probably due to the effect of photoinduced electron-hole pairs produced from TiO2. The G-TiO2/DLC film exhibits the lowestturn-on field of 5.2 V/mu m and the highest current density of 2950 mu A/cm(2) at the electric field of 8.2 V/mu m. This enhancement of field emission properties are investigated based on the surface morphology of the self-assembled nanostructures, the improved conductivity, together with the reduced work function. (C) 2016 Elsevier B.V. All rights reserved.
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