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 __   __     ___     ______     _____     ______  
 \ \\/ //   / _ \\  |      \\  |  ___||  /_   _// 
  \   //   / //\ \\ |  --  //  | ||__    `-| |,-  
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 /_//\_\\ |_||  |_|||______//  |_____||    |_||   
 `-`  --` `-`   `-` `------`   `-----`     `-`'

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Text this: Photocatalytic activity under visible light region of ca-modified TiO<inf>2</inf> np films prepared by sparking off ca-electroplated ti tips