Table 4.

Obtained Suspensions Of Nanoparticles And Their Characteristics Prior To Testing (Time 0 h)

NP Type	Deionised Water (pH = 6.93±0.05, σ = 0.07±0.01 µS/cm)			Artificial Saliva (pH = 6.81±0.05, σ = 3398±3 µS/cm)			Human Saliva (pH = 7.84±0.07, σ = 4361±6 µS/cm)
Average Size (nm)	PDI	Zeta Potential (mV)	Average Size (nm)	PDI	Zeta Potential (mV)	Average Size (nm)	PDI	Zeta Potential (mV)
ZnO	114±2	0.127±0.013	33.8±0.7	1644±57	0.513±0.065	−73.5±5.6	379±18	0.413±0.086	−20.7±1.6
ZnO+0.1%Ag	118±1	0.177±0.011	32.3±0.8	1701±93	0.547±0.047	−66.9±10.2	342±16	0.689±0.029	−11.1±3.4
ZnO+1%Ag	145±1	0.197±0.015	29.2±0.7	2315±167	0.570±0.040	−75.7±5.9	367±44	0.518±0.100	−14.2±0.9
ZnO+10%Ag	642±44	0.584±0.048	0.5±0.1	8388±1376	0.898±0.085	−60.1±1.2	616±42	0.595±0.178	−15.1±0.3
Ag (55±5 nm, HydroSilver 1000)	239±8	0.609±0.119	−2.2±0.1	2162±219	0.883±0.179	−22.8±0.7	531±84	0.583±0.116	−11.6±0.9

Abbreviations: ZnO, zinc oxide; Ag, silver; NPs, nanoparticles; σ, specific conductivity; µS, microsiemens; nm, nanometer; mV, millivolts; PDI, polydispersity index.