▎ 摘　　要

Crystalline silver nanowires (AgNWs), with lengths up to few micrometres and diameters of nearly 100 nm have been effectively synthesized on graphene nanoplatelets (GNPs) by a modified polyol method. The possible mechanism for the development of silver nanowires is investigated. The GNPs/AgNWs nano-hybrid nano-materials were characterized and explored by x-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The GNPs/AgNWs nanohybrid materials were then added in E-glass/epoxy matrix in different weight percentage to create composites. These composites were characterized and investigated for electrical characteristics and microwave absorption measurements. The GNPs/AgNWs nano-hybrid epoxy composite has shown a prominent increase in conductivity compared to that of the composites prepared with GNPs alone in the epoxy matrix. The GNPs/AgNWs nanohybrid composite with a thickness of 1.2 mm exhibited a minimum Return Loss (RL) of -6.2 dB at 17 GHz whereas GNPs reinforced composite showed minimum RL of -5.7 dB even at 2.0 mm composite thickness. The enhancement of properties in composites is explained based on the structures of the GNPs/AgNWs nano-hybrid in the epoxy matrix.