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

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Text this: Hollow carbon spheres with a controllable shell structure