Table 1. Characterization of tested NMs.

Particle	Size (nm)			ζ-pot.(mV)
	Aqua bidest.	DMEM	DMEM+10% FBS	Aqua bidest.	DMEM	DMEM+10% FBS
PPS 20 nm	22.76	28.89	73.59*/12.37	−37.1	−13.4	−11.7
PPS 200 nm	211.6	211.5	224.8	−57.6	−11.0	8.08
Fluoro-Max 20 nm	22.22	44.56	58.26	−11.1	−28.2	−10.3
MWCNT >50 nm	n.d.‡	602.9	50.41	n.d.‡	−16.9	−11.0

^*Predominant peak is indicated first, ^‡Not determined due to aggregates.