Table 1. Results of Fits to the SANS Data Assuming a Linear Combination of a Power Law and Core/Shell Spheres^a.

	FF5	FF15	FF25
core diameter [nm]	3.2(2)	15.4(2)	21.3(2)
shell thickness [nm]	6.4(2)	4.9(1)	6.9(1)
core SLD [10–4 nm–2]	6.9	6.9	6.9
shell SLD [10–4 nm–2]	2.79(10)	2.40(15)	2.94(20)
power exponent	1.8(1)	2.2(1)	2.3(2)
distribution radius [%]	4.9	6.7	4.9
distribution shell thickness [%]	15	15	9.1

^aThe SLD of the cores was fixed, and the SLD of the solvent was allowed to vary in a tight range near 4.6 × 10^–4 nm^–2. For the definition of SLD see the Methods section.