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Vacuum electron field emission from SnO 2 nanowhiskers synthesized by thermal evaporation

2004; IOP Publishing; Volume: 15; Issue: 11 Linguagem: Inglês

10.1088/0957-4484/15/11/006

1361-6528

Suhua Luo, Qing Wan, Wan‐Ling Liu, Ming Zhang, Zengfeng Di, Shuo Wang, Zhitang Song, C. L. Lin, Jiyan Dai,

Transition Metal Oxide Nanomaterials

Rod-shaped and wire-shaped SnO2 nanowhiskers were synthesized by thermal evaporating of tin powders at 900 °C. Three Raman peaks (474, 632, 774 cm−1) showed the typical feature of the rutile phase of as-synthesized SnO2 nanowhiskers, which was consistent with the result of x-ray diffraction. A relatively low turn-on field of 1.37 V µm−1 at a current density of 0.1 µA cm−2 was obtained. The dependence of emission current density on the electric field followed a Fowler–Nordheim relationship. Our results indicated that SnO2 nanowhiskers had an interesting FE property as a wide band gap semiconductor.