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  ______    ______    ____     __   __            
 /_____//  /_   _//  |  _ \\   \ \\/ //     ___   
 `____ `    -| ||-   | |_| ||   \ ` //     /   || 
 /___//     _| ||_   | .  //     | ||     | [] || 
 `__ `     /_____//  |_|\_\\     |_||      \__ || 
 /_//      `-----`   `-` --`     `-`'       -|_|| 
 `-`                                         `-`

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Text this: Hollow micro-/nanostructures : synthesis and applications