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

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Text this: Hollow gradient‑structured iron‑anchored carbon nanospheres for enhanced electromagnetic wave absorption