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Field emission of graphene is usually limited by the surface morphology because the existing deposition methods lead to graphene flakes that lay flat on the substrate. To overcome this problem, we synthesized polypyrrole(PPy)-graphene composites by electrochemical deposition method. The graphene flakes are oriented at some angles on the PPy surface, leading to good field emission performance. This...
The growth of graphite film on copper foil by plasma enhanced chemical vapor deposition was achieved at the temperature as relatively low as 800Π. The obtained sample was characterized by SEM and Raman spectra. The results show that the transparent continuous graphite film can be obtained by PECVD.
ZnO/CNTs composites were used to fabricate the field emission layer onto electrode by screen printing process. Through adding a graphene resistive layer between the electrode and the emission layer, the turn-on field was decreased from 1.6 v/μm to 1.0 v/μm; the emission uniformity and the emission stability were improved apparently.
Graphene was synthesized by the modified Hummers method and a hydrazine reduction process. The obtained graphene was characterized by various diagnostic techniques, such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). A layer of transparency crumpled film was...
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