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  ____      _____              _    _      _____  
 |  _ \\   |  ___||     ___   | || | ||   / ___// 
 | |_| ||  | ||__      /   || | || | ||   \___ \\ 
 | .  //   | ||__     | [] || | \\_/ ||   /    // 
 |_|\_\\   |_____||    \__ ||  \____//   /____//  
 `-` --`   `-----`      -|_||   `---`   `-----`   
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Text this: Hollowing Sn-doped TiO2nanospheres via Ostwald ripening