Researchers at the University of Chicago’s Pritzker School of Molecular Engineering (PME) has investigated the fundamental physics of non-Newtonian fluids using piezoelectric nanoparticles. The team discovered the role friction between particles play in causing materials to flip from a fluid to more solid structure.    Findings were published in Proceedings of the National Academy of Sciences. The properties of oobleck and other non-Newtonian fluids change under pressure or stress, but until n...