Text this: Lanthanide-based graded barrier structure for enhanced nanocrystal memory properties

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