<ul><li>Scientists at ETH Zurich have discovered how tiny rolling particles can prevent suspensions, such as ketchup, from becoming thicker.</li><li>The research focused on measuring the friction forces between individual particles using an atomic force microscope.</li><li>Smooth or slippery particles slid across each other, while rough or slightly sticky particles acted like gears, rolling more easily with less force.</li><li>The findings can help engineers design suspensions that flow more smoothly, benefiting industries such as construction and electronics manufacturing.</li></ul>

Why ketchup gets stuck—and how tiny rolling particles could fix it

Discover more