Electron field emission studies on ZnO nanowires |
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| Affiliation: | 1. ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Centre, Via Anguillarese 301, 00123 Santa Maria di Galeria, Rome, Italy;2. DInESto, Drive the Innovation in Energy Storage, Via Provincie, 04012 Cisterna di Latina, Italy;3. ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Frascati Research Centre, Via E. Fermi 45, 00044 Frascati, Italy |
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| Abstract: | The zinc oxide (ZnO) nanowires with different morphology and diameter were synthesized on silicon (100) substrates by heating pure zinc powder at low temperatures of 450 °C and 480 °C. Scanning electron microscopy (SEM) was used to analyze the morphology and diameter of samples. The electron field emission properties between different morphology of ZnO nanowires samples were compared. A low turn-on field at 3.6 V/μm was observed from nanorods due to better alignment, and a strong emission current density of 3.6 mA/cm2 at electronic field 9.0V/μm was obtained from needle-like nanowires sample. The emission stability of ZnO samples is also presented. |
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