{
  "id": 9021490,
  "title": "From spider webs to mosaics: How nanosheets of graphene oxide control the patterns left by a drying droplet",
  "url": "https://urgent.news/2026/09/21/from-spider-webs-to-mosaics-how-nanosheets-of-graphene-oxide-control",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-21T22:00:05.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-09-spider-webs-mosaics-nanosheets-graphene.html"
  },
  "original_language": "en",
  "account": null,
  "summary": "A drop of coffee on a tabletop often leaves a dark ring behind. This everyday mark is a reminder that a drying droplet is not passive: As water evaporates, it can transport the particles suspended inside it toward the edge. Scientists call this the coffee-ring effect. For inkjet printing and surface coatings, however, a ring is often exactly what engineers do not want. They need the material to…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}