أرسل هذا في رسالة قصيرة: Water-Soluble Upconversion Nanoparticles by Micellar Route

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