Table 2a.

Characterization of polystyrene particles in different media by PCS.

Particle	Size (nm)		Zeta potential (mV)
	DMEM	DMEM + 10% FBS	DMEM	DMEM + 10% FBS
PPS 20 nm	29	74	− 13	− 12
PPS 200 nm	212	224	− 11	− 8
CPS 20 nm	42	80	− 37	− 8
CPS 200 nm	230	212	− 42	− 10