Field electron emission properties of bulk diamond/expanded graphite composite cathode.

ABSTRACT: Diamond exhibits a negative electron affinity potential and a high thermal conductivity. Nevertheless, the elevated surface resistivity of diamond restricts its utilization in cold cathodes. Expanded graphite, an allotrope of diamond, is a material that exhibits high electrical conductivity and is cost-effective to manufacture. The combination of these two elements into a hybrid structure is a highly desirable proposition, as it would facilitate a synergistic approach to field-emitting materials. In this study, diamond-expanded graphite bulk composite cathodes were prepared using the cold pressing method. The results demonstrate that the cathode comprising diamond particles with a diameter of 0.5 μm and a content of 20% exhibits the most favorable electron emission activity. The turn-on fi

SUBMITTER: Ji Q 

PROVIDER: S-EPMC12723154 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature