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

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Text this: Perovskite Nanocrystals with Tunable Fluorescent Intensity during Anion Exchange for Dynamic Optical Encryption