A Study of Nanosilver Colloid Prepared by Electrical Spark Discharge Method and Its Antifungal Control Benefits

Abstract

This is a study of an antimicrobial test, including yeast, Aspergillus Niger, and Aspergillus Flavus, on a nanosilver colloid solution. The antibiosis is compared with a standard silver ion solution at the same concentration as in the experimental process. This study proved that the nanosilver colloid prepared by the electrical spark discharge method (ESDM) is free of any chemical additives, has a microbial control effect, and that the effect is much better than the Ag+ standard solution at the same concentration. 3M Count Plate (YM) is used to test and observe the colony counts. The microbial control test for yeast, Aspergillus Niger, and Aspergillus Flavus is implemented in the nanosilver colloid. In addition to Aspergillus flavus, an Ag+ concentration of 16 ppm is enough to inhibit the growth of the samples. At the same concentration, the nanosilver colloid has a much better microbial control effect than the Ag+ standard solution, which may be because the nanoparticle can release Ag+ continuously, so the solution using the ESDM has a more significant microbial control effect.

Molecular Biocompatibility of a Silver Nanoparticle Complex with Graphene Oxide to Human Skin in a 3D Epidermis In Vitro Model

“…The selected nanomaterials could provide an alternative to traditional biocides. Silver nanoparticles (AgNP) undoubtedly show antibacterial properties [6] against both G(+) bacteria [7] and G(−) [8] as well as viruses [9] and fungi [10,11]. AgNP have a nonspecific and very broad spectrum of antimicrobial activity resulting from the mechanism of their action, especially their unique affinity to the bacterial cell membrane, which causes damage [12].…”

“…Tseng et al [ 11 ] argue that the antimicrobial efficacy of the AgNP colloid is at a level that is not harmful to humans. Nevertheless, the search for a method that would improve the performance of AgNP, reduce its absorption through the skin, and completely eliminate the potential cytotoxicity and genotoxicity of nanoparticles is timely, considering the search for new decontamination options in the time of the COVID-19 pandemic.…”