Electron field emission from Fe-doped TiO2 nanotubes

Chih-Chieh Wang; Kuan-Wen Wang; Tsong-Pyng Perng
April 2010
Applied Physics Letters;4/5/2010, Vol. 96 Issue 14, p143102
Academic Journal
Titanium dioxide nanotubes were prepared by refluxing TiO2 in 10 M NaOH at 200 °C for 12 h. The light absorption edge was slightly shifted to a longer wavelength when 0.025 mol % of iron was incorporated to TiO2 nanotubes. A turn-on field at 12 V/μm and a maximum current density of 12 mA/cm2 at 19 V/μm was observed for the Fe-doped but not for pure TiO2. The field emission behavior can be correlated with the geometry and electronic states of the nanotubes.


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