Abstract
Graphene/zinc oxide nanowires/graphene (G/ZnO NWs/G) sandwich composites were firstly synthesized on nickel foam by electrostatic spray deposition technique and hydrothermal reaction in sequence. Microstructure and chemical analysis showed the dense and uniform ZnO NWs encapsulated by bottom and upper graphene layers. The G/ZnO NWs/G composites as cold cathodes for field emission (FE) exhibited improved performances with a lower turn-on electric field of 7.45 V/μm, a higher field enhancement factor of 5328 and higher emission current stability over 10 h than G/ZnO NWs. The enhanced FE properties of G/ZnO NWs/G were mainly attributed to its sandwich structure, which introduced more surface defects and numerous emission sites, simultaneously decreased the work function and resistivity of emitters. This investigation paves a new way for developing high-performance cold cathode FE materials.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
