Abstract
Cobalt silicide nanowires have been synthesized with cobalt chloride precursor using a simple atmospheric pressure chemical vapor transport and reaction method without intentional metal catalysts. The synthesized nanostructure with various morphologies and phases were controlled by varying the temperature and the vapor pressure. The diameters and lengths of CoSi single-stem nanowires are 40-80 nm and tens of micrometers, respectively. The three-dimensional (3D) network structure of CoSi phase is 10-20 □m in size with an average diameter of 100 nm. The Co2Si nanowires were synthesized at a higher temperature. Diameters and lengths of Co2Si nanowires are 20-50 nm and several micrometers, respectively. The Co2Si aloe-like nanowires are about 10 □m in size. The turn-on and threshold fields of 1.42 V/□m and 2.05 V/□m, respectively, were obtained for the CoSi nanostructure in field-emission measurements.