The possible parameter set of the chosen model is rather large including eight (without structure factor) or more fit variables. For reasons of clarity, only the micellar structure defining parameters (size parameters and SLDs) will be shown (Figure and). Moreover, to constrain the fitting procedure, it was attempted to match the overall particle size with the results from DLS and cryo-TEM. The full list of model parameters for each sample can be found in the supporting information. As mentioned, A-pBuOzi-A and A-pBuOx-A form micelles without the need of added CUR with critical micelle concentration (cmc) values of 5 mg/L (0.5 µM) and 8 mg/L (1 µM), respectively. Only A-pPrOzi-A needs CUR to form micelles, i.e. shows CUR-induced micellization. Hence, there are no values for the core and shell sizes as well as their respective SLDs for pure A-pPrOzi-A in heavy water without any CUR. Obviously, the micellar sizes and structures develop differently in dependence of the CUR-content for all three polymers (Figure , 3). Therefore, the different formulations will be evaluated separately in the following. Important to note, the formulation of A-pBuOx-A at polymer/CUR = 10/5 is already above the maximum drug loading, and precipitation occurs. This resulted in very unstable fits in our current work. Therefore, we will not discuss the data analysis of this formulation at this loading any further. Please note, when size parameters of a particular compartment approach zero, one can consider the resulting morphology again as core-shell instead of core-shell-shell.