Table 2.

Sizes (diameter, nm) of uncoated and coated NPs dispersed in Daphnia magna exposure medium. Measures performed via DLS at the maximum exposure concentration, at time 0 (T0) and after 48 h of exposure (T48). The average values of three independent measurements are presented (mean ± SEM). * PdI was close to 1.

		Daphnia magna Medium
NM	Time (h)	PdI	Z-Average (nm; Mean ± SEM)	Main Peak Intensity (nm; Mean ± SEM)
TiO2-UNC	T0	0.42 ± 0.10	7258 ± 640	3852 ± 591
	T48	0.46 ± 0.12	4681 ± 2711	1484 ± 871
TiO2-CIT	T0	0.16 ± 0.02	211 ± 101	255 ± 128
	T48	0.16 ± 0.01	322 ± 58	362 ± 67
TiO2-PEG	T0	0.29 ± 0.10	2914 ± 105	3115 ± 159
	T48	0.28 ± 0.06	4068 ± 512	3845 ± 427
TiO2-DDPA	T0	0.46 ± 0.18	441 ± 254	213 ± 47
	T48	*	-	-
CeO2-UNC	T0	*	-	-
	T48	*	-	-
CeO2-CIT	T0	0.20 ± 0.02	400 ± 32	462 ± 46
	T48	0.18 ± 0.02	482 ± 59	567 ± 84
CeO2-PEG	T0	0.53 ± 0.06	3939 ± 2467	1475 ± 448
	T48	0.21 ± 0.03	4451 ± 723	3915 ± 220
CeO2-DDPA	T0	0.60 ± 0.15	598 ± 252	256 ± 70
	T48	*	-	-
Ag-CIT	T0	0.47 ± 0.09	390 ± 128	222 ± 10
	T48	0.52 ± 0.02	512 ± 17	310 ± 7
Ag-PEG	T0	0.44 ± 0.01	345 ± 31	203 ± 19
	T48	0.62 ± 0.01	588 ± 24	224 ± 11
Ag-OAM	T0	*	-	-
	T48	*	-	-