%0 Conference Proceedings %T Preparation and characterization of TiO2: Al doped thin films by spray pyrolysis method –The effects of impurity on the Improvement of Photocatalystic activities %A Azhir, Elahe %A Shahtahmassebi, Nasser %A M.M. Bagheri Mohagheghi %A M. Karimipour %J نانو داروها در علوم پزشکی %D 2009