Patterning of a-Fe_2O_3 nanowires by pressing a microstructured mold and their field-emission properties

摘要

We patterned α-Fe_2O_3 nanowires by a simple pressing method and investigated their field emission properties. We synthesized α-Fe_2O_3 nanowires from a sputtered thin Fe film. Fe films (thicknesses: 150. 300, 650 and 1700 nm) were annealed from room temperature to 375 °C for 1 min and maintained at a temperature of 375 °C for 0-60 min. 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.