أرسل هذا في رسالة قصيرة: Morphology-tunable assembly of periodically aligned Si nanowire and radial pn junction arrays for solar cell applications

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