Table 1 Nanoparticle properties in 0.9% NaCl solution for different concentrations.

From: Toxicity of ZnO and TiO2 to Escherichia coli cells

Sample

C

Aggregation size (nm)

Zeta potential (mV)

Zn2+(ppb)

Turbidity (FTU)

ZnO

0.01

166(33%) 336(67%)

−21.5

379

10.9

0.1

235(76%) 759(24%)

−11.8

510

155

1.0

1377(100%)

8.8

720

>1000

TiO2

0.01

221 (12%) 610(88%)

−24.6

—

49.5

0.1

583(100%)

−19.3

—

711

1.0

334(100%)

N/A

—

>1000

  1. Zn2+ concentration in the control sample was below the detection limit (10 ppb). C denotes sample concentration in mg/ml, FTU denotes formazin turbidity unit. N/A denotes not measurable value.
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