A NanoBrook Omni particle size and zeta potential analyzer was used to measure micelle size distributions. Each sample was measured using three separate runs of 60 seconds each. Note: Micelles were fabricated as reported in Methods. Micelles containing ppy2 were prepared with a saturated sensitizer solution, whereas those that did not contain ppy2 were prepared with an equal volume of neat TCB. Micelles containing PPO were prepared with a 200 mM in chloroform annihilator solution, whereas those that did not contain PPO were prepared with an equal volume of neat chloroform. As-fabricated micelles were diluted by a factor of 5 with DI water and filtered with a 0.22-μm PVDF syringe filter prior to taking measurements with a NanoBrook Omni particle size and zeta potential analyzer. Values reported are the mean ± the standard deviation of three 60second measurements.