أرسل هذا في رسالة قصيرة: High-performance triboelectric nanogenerator with double-surface shape-complementary microstructures prepared by using simple sandpaper templates

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