Self-organized multi-layered graphene-boron-doped diamond hybrid nanowalls for high-performance electron emission devices

摘要: Carbon nanomaterials such as nanotubes, nanoflakes/nanowalls, and graphene have been used electron sources due to their superior field emission (FEE) characteristics. However, these materials show poor stability short lifetimes, which prevent use in practical device applications. The aim of this study was find an innovative nanomaterial possessing both high robustness reliable FEE behavior. Herein, a hybrid structure self-organized multi-layered (MLG)–boron doped diamond (BDD) nanowall with characteristics successfully synthesized using microwave plasma enhanced chemical vapor deposition process. Transmission microscopy reveals that the as-prepared carbon clusters uniform, dense, sharp morphology sp3 cores encased by sp2 MLG shell. Detailed nanoscale investigations conducted peak force-controlled tunneling atomic force each core–shell structured cluster fields emits electrons equally well. MLG–BDD low turn-on 2.4 V μm−1, current density 4.2 mA cm−2 at applied 4.0 large enhancement factor 4500, prominently lifetime (lasting for 700 min), demonstrate superiority over other nanostructured materials. potential MLG-BDD applications further illustrated illumination behavior microplasma cathode, where threshold voltage 330 (low mm−1) long 358 min were demonstrated. fabrication nanowalls is straight forward thereby opens up pathway advancement next-generation cathode brightness microplasma-based display devices.