▎ 摘　　要

Graphene-doped diamond-like carbon(G/a-C: H) nanocomposite films were fabricated using a liquid-phase electrochemical method. A nanocomposite film growth mechanism is proposed and discussed. The deposited films were characterized using scanning electron microscopy (SEM), Raman spectroscopy, transmission electron microscopy (TEM), and Fourier transform infrared (FTIR) spectroscopy. The results showed that graphene sheets were homogeneously dispersed in a hydrogenated amorphous carbon (a-C: H) matrix. The deposited G/a-C: H film surface was uniform and smooth. Field emission experiments showed that graphene doping slightly increased the turn-on field, from 4.7 to 5.8 V.mu m(-1), and significantly improved the current density, from 384 to 876 mu A.cm(-2).