Patterning of α-Fe2O3 nanowires by pressing a microstructured mold and their field-emission properties

We patterned @a-Fe"2O"3 nanowires by a simple pressing method and investigated their field emission properties. We synthesized @a-Fe"2O"3 nanowires from a sputtered thin Fe film. Fe films (thicknesses: 150, 300, 650 and 1700nm) were annealed from room temperature to 375^oC for 1min and maintained at a temperature of 375^oC for 0-60min. The length of the nanowires increased with the annealing time and thickness of the Fe films. We pressed a microstructured mold onto the nanowires and patterned the nanowires with an island array. The field-emission current of the nanowires patterned by pressing a mold was higher than that of nonpressed nanowires.