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

Kuo-Hsiung Tseng,Chao-Yun Liu,Juei-Long Chiu,Meng-Yun Chung,Chao-Heng Tseng

doi:10.3390/mi12050503

Kuo-Hsiung Tseng, Chao-Yun Liu + Show 3 more

Open Access

https://doi.org/10.3390/mi12050503

Copy DOI

Journal: Micromachines	Publication Date: Apr 30, 2021
Citations: 1	License type: CC BY 4.0

Affiliation: National Taipei University of Technology

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.

Highlights

This study aimed to examine the effects of the nanosilver colloid it can be used in organisms or made into dressings that have a microbial control agent
The nanosilver colloid was prepared using the electrical spark discharge method, which is free of any chemical additives
A microbial control test was conducted with nanosilver colloids on Aspergillus niger, Aspergillus flavus, and yeast

Summary

Introduction

Aspergillus is the main fungal contaminant and one of the important factors leading to the decay and accumulation of mycotoxins in food. The pollution of these microorganisms will cause huge economic damages and losses, and pose a threat to human health. We are surrounded by the antimicrobial applications of nanosilver, in our daily necessities, textile clothing, and cosmetics, as well as in our air-conditioners and washing machines [1]. When nanosilver is used as an antimicrobial agent, it may be hazardous to the environment and the ecology [2,3]. The FDA has warned that ingesting the nanosilver colloids may cause poisoning

Objectives

Methods

Discussion

Conclusion