Direct deposition of graphene nanowalls on ceramic powders for the fabrication of a ceramic matrix composite
Zhou Hai-Tao1, Liu Da-Bo1, Luo Fei1, Tian Ye1, Chen Dong-Sheng1, Luo Bing-Wei1, †, Zhou Zhang2, Shen Cheng-Min2, ‡
       

(a) High-magnification SEM image of bare Al2O3 powder. (b) Image after 10-min deposition showing 2D graphene layers. (c) Image after 20-min deposition showing the transition to 3D graphene layers. (d) and (e) Graphene sheets showing variable lateral lengths at different growth temperatures. (f) High-resolution XPS spectra recorded after different deposition times. Graphene deposition parameters are: (b)–(d) 700 °C, 290 W; (e) 600 °C, 290 W.