To induce the PNPls aggregation more effectively, we chose to use large-chain hydrocarbons as solvents. The higher viscosity (η) of these solvents decreases the diffusion of the particles, lowering their kinetic energy (associated with Brownian motion); if the kinetic energy does not overcome van der Waals attractive forces, then aggregation will occur. The four solvents present viscosity values as follows: hexane (η = 0.29 mPa s), decane (η = 0.85 mPa s), dodecane (η = 1.36 mPa s), and hexadecane (η = 3.96 mPa s). We prepared 80-mg/mL Br-170 samples in all four solvents and probed their scattering pattern in the same conditions of the previous experiment at room temperature. The scattering curves are displayed in Figure .