Figure 3: A phase diagram of the morphologic evolution of the Si NP-graphene system in the space of NP distance and diameter. “+” denote the MD simulation cases in which Si NPs remain dispersed and “×” denote those in which Si NPs evolve to bundle together. A critical dispersion distance of the Si NPs, 𝑆 c r , can be determined, which has an approximately linear dependence on 𝑑 N P .