here r=|ri-rj| represents the spatial distance between beads i and j located in ri and rj. The cutoff distance cutoff r is 2.5  (attractive) for polymer-polymer interactions and polymer-NP interactions and 1.12  (repulsive) for NP-NP interactions. The interaction parameters pp  (between polymer beads), nn  (between NP beads) are fixed as 1.0  and np  (between polymer beads and NP beads) is 3.0  .