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

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