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    "headline": "Gold's Surface Builds Its Own Shield",
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    "dek": "Tulane researchers say atomic reconstruction can suppress oxygen reactions by as much as a trillion-fold on selected gold surfaces.",
    "summary": "Tulane researchers say atomic reconstruction can suppress oxygen reactions by as much as a trillion-fold on selected gold surfaces.",
    "body_text": "A Physical Review Letters study finds that gold's resistance to tarnish is not only a matter of bulk chemistry. On selected crystal faces, surface atoms reorganize into patterns that sharply reduce oxygen adsorption and reaction. The result offers an atomic explanation for gold's familiar durability and a possible lever for catalyst design, where engineers may want to preserve or deliberately interrupt that protective arrangement.",
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    {
      "source_id": "source-2026-07-12-003",
      "title": "ScienceDaily from Tulane University",
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    "title": "Gold's Surface Builds Its Own Shield",
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