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Electron Field Emission and Photoluminescence of Anatase Nanotube Arrays
Author(s) -
Yang Yang,
Wang Xiaohui,
Sun Changku,
Li Longtu
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02776.x
Subject(s) - photoluminescence , anatase , materials science , nanotube , field electron emission , anodizing , nanotechnology , electrolyte , chemical engineering , optoelectronics , electron , carbon nanotube , chemistry , photocatalysis , composite material , electrode , organic chemistry , aluminium , physics , quantum mechanics , engineering , catalysis
TiO 2 nanotube arrays with a high aspect ratio were grown on conductive Ti substrates by anodization in an organic electrolyte. The as‐prepared TiO 2 nanotubes were vertically grown and adhered well to the substrates. The photoluminescence spectrum and X‐ray diffraction showed that the crystal structure of the postannealed TiO 2 nanotube arrays was oxygen‐defective anatase. This kind of anatase nanotube arrays exhibited efficient electron field emission even at room temperature with a low applied electric field of ∼9 V/μm. The emission current exceeded 70 μA/cm 2 at an extraction voltage of 700 V.