The growth of tungsten carbide nanowires by thermal annealing of sputter-deposited WCx films was discussed. It was observed that the straight nanowires with a density of 250-260μm-2 and length/diameter in the range of 0.2-0.3μm/13-15 nm were obtained from the 700°C-annealed samples. It was also observed that the self-catalytic growth of W2C nanowires was attributed to the formation of α-W 2C phase caused by carbon depletion in the WCx films during thermal annealing. The results show that the low turn-on field paired with high packing density and simple growth process indicates that W 2C nanowire could be a potential material for field emitters.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)