05/29/2026
Ivan Racheff Professor Rosa M. Espinosa-Marzal, working with students Ming Jun Lee (PhD candidate) and Isha Bordawekar (2026 B.S. graduate), published research in Materials Horizons explaining how charged hydrogels can achieve ultra-low friction even against oppositely charged surfaces — a key step toward better cartilage replacement materials and a surprising challenge to assumptions underlying hydrogel adhesive design.
Rosa Espinosa Marzal and her team discovered that positively charged hydrogels can achieve dramatically low friction against oppositely charged surfaces under hydrated conditions — the opposite of what basic electrostatics would predict — because tightly bound water layers at the material's su...