Figure presents the computed 2-body PMF and corresponding PIP fit. The two-body interactions now become stronger and fully attractive because the smaller grafting density reduces the steric repulsions from the grafts. This reduction is also reflected in the three-body interactions (Fig. ), which remain repulsive but of weaker strengths (compare to Fig. ). The total free energy landscape of three such NPs is presented in Fig. , where the closed triangle is now strongly favored. MD simulations of 27 such NPs (Fig. ) using the CG model shows that NPs indeed assembled into sheet-like structures, which were well captured by our manybody potential (Fig. ). We also used the many-body potential to simulate the assembly of 125