▎ 摘　　要

Metacomposites obtained from nitrogen doped graphene nanosheets (NGR) with tunable negative permittivity were firstly reported. Compositions of the NGR were analyzed by Raman spectroscopy and X-ray photoelectron spectroscopy. Dielectric properties of the metacomposites were investigated in detail. It was found that the different nitrogen bonding type including pyridinic nitrogen, pyrrolic nitrogen and graphitic nitrogen played different roles on the negative permittivity of the NGR/phenolic resin metacomposites, which was easily tuned by nitrogen bonding types and doping amount. The tunable negative permittivity was ascribed to the different nitrogen doping effects. The pyrrolic N and graphitic N contributed to appearance of the negative permittivity behavior, while the pyridinic N acted as a barrier for realization of the negative permittivity.