Table S1.

Effect of filtering

Sample	$R_g,$ nm	$M_w,$ g/mol	$R_H,$ nm	C	$p.d.$	$M_L$*, kg⋅mol−1⋅nm−1	c, g/L
Not filtered	140 ± 30	2.2 ± 0.3 $\times {10}^6$	63 ± 7	0.22 ± 0.05	2.2 ± 0.1	6.9 ± 2	0.098–0.035†
Filtered	52 ± 10	9.2 ± 0.1 $\times {10}^5$	31 ± 1	0.3 ± 0.1	1.8 ± 0.1	9 ± 2	0.035
Refiltered	56 ± 5	9.2 ± 0.1 $\times {10}^5$	33 ±2	0.35 ± 0.1	1.8 ± 0.1	8.6 ± 0.9	0.035

^*$M_L$ = $M_w/L_w.$

^†A first measurement was taken at 0.098 g/L, and the solution was then diluted to 0.035 g/L and remeasured. Values correspond to the average between the two readings.