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From coffee rings to saucer patterns—how graphene oxide's surface chemistry shapes evaporating droplet deposits
An evaporating colloidal particle–laden droplet leaves behind a ring-like residue after drying. We routinely observe this ubiquitous phenomenon for dried coffee drops; thus, it is known as the "coffee ...
Gold prices appear to be breaking out of a cup and saucer pattern, closing a fresh 6-year higher. The movement of the coronavirus that has spread throughout Wuhan China, is driving a fresh round of ...
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