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/mu m and a maximum current density of 12 mA/cm(2) at 19 V/mu m 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. (C) 2010 American Institute of Physics.[doi: 10.1063/1.3373607]
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Univ Nacl La Plata, Fac Ciencias Exactas, Dept Fis, IFLP,CCT La Plata,CONICET, RA-1900 Buenos Aires, DF, ArgentinaUniv Nacl La Plata, Fac Ciencias Exactas, Dept Fis, IFLP,CCT La Plata,CONICET, RA-1900 Buenos Aires, DF, Argentina
Rodriguez-Torres, C. E.
Stewart, S. J.
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Univ Nacl La Plata, Fac Ciencias Exactas, Dept Fis, IFLP,CCT La Plata,CONICET, RA-1900 Buenos Aires, DF, ArgentinaUniv Nacl La Plata, Fac Ciencias Exactas, Dept Fis, IFLP,CCT La Plata,CONICET, RA-1900 Buenos Aires, DF, Argentina
Stewart, S. J.
Adan, C.
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CSIC, Inst Catalisis & Petr Quim, Madrid 49706, SpainUniv Nacl La Plata, Fac Ciencias Exactas, Dept Fis, IFLP,CCT La Plata,CONICET, RA-1900 Buenos Aires, DF, Argentina
Adan, C.
Cabrera, A. F.
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Univ Nacl La Plata, Fac Ciencias Exactas, Dept Fis, IFLP,CCT La Plata,CONICET, RA-1900 Buenos Aires, DF, ArgentinaUniv Nacl La Plata, Fac Ciencias Exactas, Dept Fis, IFLP,CCT La Plata,CONICET, RA-1900 Buenos Aires, DF, Argentina