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From spider webs to mosaics: How nanosheets of graphene oxide control the patterns left by a drying droplet

From spider webs to mosaics: How nanosheets of graphene oxide control the patterns left by a drying dropletWorldPing

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.

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