Newtonian to non-newtonian fluid transition of a model transient network.

摘要: The viscosity of gel-forming fluids is notoriously complex and its study can benefit from new model systems that enable a detailed control the network features. Here we use novel simple microfluidic-based active microrheology approach to transition Newtonian non-Newtonian behavior in DNA hydrogel whose structure, connectivity, density bonds, bond energy kinetics are strongly temperature dependent well known. In range 15 °C, system reversibly continuously transforms dispersion low-valence nanocolloids into shear-thinning fluid, passing through set intermediate states where it behaves as power-law fluid. We demonstrate knowledge topology free enables quantitatively predict observed using established rheology models.