) was considered for further data analysis. Choice of fitting model For the analysis of the SANS data, three different spherical form factor models were considered: A simple sphere, a core-shell sphere and a core-shell-shell sphere. Each model is available in the Irena modelling suite and was used to fit the data. The resulting c 2 -values of the best obtained fits were used as an indicator for the most suitable model for data evaluation. A full example and explanation of one sample data set and the fitting results can be found in the supporting information (Figure , S8). Based on these results, the core-shell-shell form factor model [31] 𝐹 𝑄 = Scheme 2: A graphic representation of the employed core-shell-shell sphere model with its parameters as are defined in Eq. 5.