▎ 摘　　要

Graphene decorated with ZnO nanoparticles (G-ZnO hybrids) were prepared on n-Si substrates. The microstructures and chemical states of these hybrids were analyzed. Based on these experimental results, a field emission enhanced mechanism of the G-ZnO hybrids related to stable oxygen groups in the form of cyclic edge ethers is proposed. G-ZnO hybrids consist of a higher ratio of C-O-C chains than in graphene structures. This causes the potential barrier the electrons have to overcome in vacuum to be further diminished, resulting in a lower work function. Consequently, both the potential barrier height and width for the electrons emission are further reduced. So electrons can easily tunnel through the full barrier width, causing a larger field emission current in the G-ZnO hybrids. Such insight into the C-O-C chains from the G-ZnO hybrids offers the prospect for understanding the physical mechanism and future novel applications as field emitters.