أرسل هذا في رسالة قصيرة: Influence of PVP on the morphologies of Bi<inf>2</inf>S<inf>3</inf> nanostructures synthesized by solvothermal method

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