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  "path": "/nanotechnology-news3/newsid=68999.php",
  "publishedAt": "2026-03-26T13:32:14.000Z",
  "site": "https://www.nanowerk.com",
  "textContent": "3D metastructures produce programmable structural colors for optical encryption, with a destruction mechanism that permanently erases data after readout.",
  "title": "3D metastructures enable time-programmable color encryption with built-in self-destruction"
}