Table 1.

Characterization of Ag nanoparticles infused into the IPPSF.

Ag nanoparticle	Stock solvent	Ag concentration in stock (mg/mL)	Ag concentration in infusion media (μg/ml)		Diameter (nm)		Zeta Potential (mV)
			Target	Measured	TEM	DLS
Silver citrate (Biopure)	Aqueous 2mM citrate	1.0	0.855	0.84 ± 0.014	19.2	NA	−36.8
Silica-coated silver	Milli-Q water	4.66	0.855	0.48 ± 0.010	40.5	146.7	25.4

NA=Not applicable. The manufacturer, Nanocomposix, uses a a DLS instrument with a HeNe laser operating at 632.8 nm, and silver nanoparticles with physical diameters less than ~25 nm do not scatter enough photons for use to obtain reasonable signal to noise ratios to determined the hydrodynamic diameter.