The Co-3OHPP/nAg hybrid presents a larger plasmonic band than the initial silver colloidal solution, but the absorption domain does not increase as much as in the case of the hybrid formed with gold colloid.

To finally synthesize the green gold/silver (Au/Ag) nanocomposite, the colloidal solutions which had been prepared were mixed together to obtain the final solution which contained silver and gold nanoparticles.

This shows uniformity of biofunctionalized AgNP even after ultrasonication confirming the stability of colloidal solution. The zeta potential of the synthesized and preserved colloidal solution was -33.55 which improved to -35.57 after removal of sediment AgNP and extracellular organic impurities on ultrasonication.

Additionally, the diphenylamine test did not reveal presence of nitrates in the NPs colloidal solution after the third stage of centrifugation (Figure 4(a)).

It is clear that regardless the number of runs, (i) the film thickness increases as a function of deposition time up to 5 min, because at this deposition time range the film grows in the colloidal solution state.

On the other hand, the size of NPs in colloidal solutions cannot be uniform, and not negligible problems can be observed due to instability of such a system [31, 32].

In comparison to the conventional antibiotics, nanostructured antimicrobial is regarded assistant factor in reducing the toxicity and lowering the cost more stable for long-term storage so NPs can resist high pH and temperature without being inactivated [15], NPs production by pulsed laser ablation of targets in liquids has lately become a promising technique for several advantages such as, straightforward, ease of production, NPs synthesizing in liquid avoiding the use of vacuum apparatus, direct synthesizing of NPs in solutions, pure colloidal solutions without the formation of contamination (green technique), all particles are collected by one-step and low costs of processing [16],

Consequently, the starting Si[O.sub.2] colloidal solution was prepared.

To study the stability of Cu colloidal solution in air, the absorption of Cu NPs was measured by UV-visible spectroscopy.

Silver nanoparticle colloidal solution prepared by using (magnetic stirring and cooling method).

In this study, some of the woven fabric samples were exposed to oxygen gas plasma and then treated with antibacterial chemical agents through the padding process using a colloidal solution of silver chloride and titanium dioxide.

The synthesized AgNPs were assessed by measuring the absorbance of the colloidal solution, the size, the shape, and the stability of the synthesized AgNPs.