Synthesis and Characterization of Monometallic (Ag, Cu) and Bimetallic Ag-Cu Particles for Antibacterial and Antifungal Applications

Table 3

The antibacterial and antifungal activity of selected Ag and Cu based colloidal solutions immobilized at cotton-synthetic fabric. The static activity was determined in accordance with the following equation: (see details in Section 2). The lethal activity was determined in accordance with the following equation: (see details in Section 2).

Bacterial strain	Candida albicans; ATCC 10231	Escherichia coli; ATCC 8739	Staphylococcus aureus; ATCC 6538
Inoculum concentration (cell/mL)	0.9 ± 0.15 × 10^5	1.3 ± 0.1 × 10^5	1.8 ± 0.15 × 10^5
Value of growth ()	1.51	1.51	1.54
The method of calculating the number of viable microorganisms	Plate method
Type of fabric	Cotton-synthetic fabric
	The static activity ()/lethal ()
NanoAg 94	0.21/−1.27	Absence	Absence
NanoCu 222	0.54/−0.94	0.31/−1.20	−0.01/−1.55
Alloy Ag/Cu	−0.02/−1.50	Absence	Absence
Ag core/Cu shell	0.09/−1.39	Absence	Absence
Cu core/Ag shell	0.46/−1.02	0.03/−1.47	0.03/−1.50
NPs Cu/ions Ag^+	0.18/−1.30	Absence	Absence
NPs Ag/ions Cu^2+	−0.05/−1.43	Absence	Absence

Absencemeans the complete elimination of microorganisms. Sample is active microbiologically.