Abstract
Novel self-organized hierarchical SnO 2 nanostructures have been successfully prepared by vapor phase transport with the assistance of a stainless steel grid at 950 ∘C. Scanning electron microscopy shows that the two kinds of products synthesized display interesting sallow-like and fishbone-like morphologies, in which numerous secondary branches are grown randomly around the main stems. Transmission electron microscopy analysis indicates that SnO 2 nanowires are single crystals. Field emission measurements of these nanostructures showed a high emission current density and low turn-on field of 1.88 and 2.36 V μm −1, which is comparable to that of one-dimensional SnO 2 nanostructure. We also studied the influence of gas adsorption on the field emission properties of hierarchical SnO 2 nanostructures. The good performance for field emission makes the hierarchical SnO 2 nanostructures promising candidates for further applications in field emission microelectronic devices.
Published Version
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