أرسل هذا في رسالة قصيرة: Graphene and its derivatives: Switching on and off

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