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Local conductivity study of TiO 2 electrodes by atomic force microscopy
Author(s) -
Jiang Feng Zhi,
Zhang Dong She,
Lin Yuan,
Song Yan Lin,
Xiao Xu Rui,
Jiang Lei,
Zhu Dao Ben
Publication year - 2001
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1022
Subject(s) - conductivity , titanium tetrachloride , nanocrystalline material , indium tin oxide , titanium dioxide , aqueous solution , anatase , titanium , electrode , materials science , tin dioxide , chemical engineering , atomic force microscopy , electrical resistivity and conductivity , titanium oxide , thin film , analytical chemistry (journal) , nanotechnology , chemistry , composite material , catalysis , metallurgy , photocatalysis , biochemistry , chromatography , electrical engineering , engineering
Titanium dioxide (TiO 2 ) nanocrystalline porous film electrodes were prepared by the sol–gel method on indium–tin oxide (ITO) glass and chemically modified further by an aqueous solution of titanium tetrachloride for solar energy conversion application. The surface topography and local conductivity of the TiO 2 films were investigated by atomic force microscopy and a simultaneous current mapping technique in the dark and under ultraviolet illumination, respectively. It was found that the conductivity of the films was improved by chemical treatment and the possible mechanism of the effect was discussed. Copyright © 2001 John Wiley & Sons, Ltd.