Abstract
Active matter models and microrheology-based characterization techniques collectively quantify active stresses generated by out-of-equilibrium materials and polymer networks in cellular biology and tissue engineering. Our optical tweezer-based microrheological measurements of reconstituted axonemal dynein-microtubule active networks made with beads 5 to 10-fold larger than the laser focal point indicated that nonlinearities and sensitivities in both bead-detection and force-bead displacement relationships violated assumptions of linearity inherent in standard optical tweezer-based microrheological measurements.
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