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__    __     ___     _____       ___      _____   
\ \\ / //   / _ \\  |  __ \\    / _ \\   / ____|| 
 \ \/ //   / //\ \\ | |  \ ||  / //\ \\ / //---`' 
  \  //   |  ___  ||| |__/ || |  ___  ||\ \\___   
   \//    |_||  |_|||_____//  |_||  |_|| \_____|| 
    `     `-`   `-`  -----`   `-`   `-`   `----`

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Text this: Coexisting photoluminescence of Si and Ge nanocrystals in Ge/Si thin film