Abstract
In2O3 nanostructures such as aligned nanocolumn arrays, nanowires and nanopyramids werefabricated using a simple physical evaporation technique. Nanocolumn arrays andthe nanowires were produced using an Au catalysed vapour–liquid–solid (VLS)technique and the nanopyramid structures were prepared using a non-catalyticapproach. Field-emission studies revealed that the morphologies of theseIn2O3 nanoforms have considerable effects on the field-emission properties. Amongthese nanoforms, nanocolumn arrays have the lowest turn-on voltageand the highest field enhancement factor. The results indicated that theIn2O3 nanoforms could be used as cathode materials for the fabrication of devices based onfield-emission properties.
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