Abstract
Graphene oxide (GO) sheets were synthesized via a modified Hummer’s method. Subsequently, annual-ring shaped graphene hydrogel was formed through alkali-inducing hydrothermal process. The lyophilized GO hydrogel was tailored to a cylindrical emitter and demonstrated good field emission performance: maximum current density reached 2.32mA/cm2, field enhanced factor of 1969 and turn-on electric field at 2.41V/μm, accompanied with excellent stability. Moreover, the emitter also exhibited superior mechanical properties, such as ultra-light, flexibility and free-standing. These results suggest that the resultant with unique structure has a potential to be utilized as a high-performance field emitter.
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.
