Photocatalysis of sculptured thin films of TiO[sub 2]

Suzuki, Motofumi; Ito, Tadayoshi; Taga, Yasunori
June 2001
Applied Physics Letters;6/18/2001, Vol. 78 Issue 25, p3968
Academic Journal
Enhanced surface reaction efficiency has been demonstrated in the photocatalysis of obliquely deposited TiO[sub 2] thin films with variously shaped columns such as zigzag, cylinder, and helix. The columnar thickness and spacing play an important role in the enhancement of the effective surface area, while the columnar shape is less important. The optimum morphology for a surface reaction has been obtained at the deposition angle α=70°, where the photocatalytic activity is 2.5 times larger than that at α=0°. The morphology controlled obliquely deposited thin films are applicable for solar cell, electro- and photochromic devices besides photocatalyst. © 2001 American Institute of Physics.


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