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  "path": "/nanotechnology-news3/newsid=69487.php",
  "publishedAt": "2026-05-29T13:18:36.000Z",
  "site": "https://www.nanowerk.com",
  "textContent": "Moisture in the air changes how a tiny photonic structure reflects light, exposing concealed patterns for encryption, authentication and sensing.",
  "title": "Humidity-activated optical chip reveals hidden images for secure data storage"
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