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We present a systematic investigation of static and dynamic properties ofblock copolymer micelles with crosslinked cores, representing modelpolymer-grafted nanoparticles, over a wide concentration range from diluteregime to an arrested (crystalline) state, by means of light and neutronscattering, complemented by linear viscoelasticity. We have followed theevolution of their scattering intensity and diffusion dynamics throughout thenon-ergodicity transition and the observed results have been contrasted againstappropriately coarse-grained Langevin Dynamics simulations. These stable modelsoft particles of the core-shell type are situated between ultrasoft stars andhard spheres, and the well-known star pair interaction potential is notappropriate to describe them. Instead, we have found that an effective brushinteraction potential provides very satisfactory agreement between experimentsand simulations, offering insights into the interplay of softness and dynamicsin spherical colloidal suspensions.

Static and Dynamic Properties of Block-Copolymer Based Grafted Nanoparticles Across the Non-Ergodicity Transition