The NP cores interact with each other through an expanded LJ potential 𝑈 LM (𝑟 -2𝑅 ?@ ; 𝜎, 𝜀 ?@ , 𝑟 G = 2.5𝜎), where 𝑟 is the distance between the centers of the NP cores. The 2𝑅 ?@ shift prevents the NP cores from penetrating each other and 𝜀 ?@ = 30𝜀 (unless otherwise stated)