A new green method for the synthesis of silver nanoparticles and their antibacterial activities against gram‐positive and gram‐negative bacteria

Abstract

This study aims to evaluate the capability of Ageratum conyzoides and Mikania micrantha extracts to synthesize silver nanoparticles (AgNPs) and their antibacterial capability against gram‐positive and gram‐negative bacteria. Several properties of the synthesized AgNPs, including plasmonic, biomolecule bonding, shape, size, and antibacterial, were investigated. Ultraviolet–visible (UV–vis) spectroscopy was employed for characterizing their plasmonic properties. Functional groups on the produced AgNPs were investigated by Fourier‐transform infrared (FT‐IR) spectroscopy. The size and shape of the AgNPs were identified using the field‐emission scanning electron microscopy (FESEM). Inhibition zone measurement was carried out for evaluating the antibacterial capability. This study showed that the extracts of A. conyzoides and M. micrantha were able reducing agents as evidenced by the formation of the spherical AgNPs. UV–vis spectroscopy, FT‐IR spectroscopy, and FESEM confirmed the physicochemical characteristics of AgNPs. AgNPs that were synthesized using M. micrantha were slightly smaller than those produced using A. conyzoides. In general, the present work establishes that the synthesized AgNPs have antibacterial capability depending on their size and synthesis procedure.

A green deposition method of silver nanoparticles on textiles and their antifungal activity

“…Several studies have confirmed the correlation between the UV-vis spectrum and properties of AgNPs [24][25][26][27]. A single peak in the UV-vis spectrum can be correlated with uniform spherical AgNPs [28][29].…”

In Situ Evaluation of Filter Media Modified by Biocidal Nanomaterials to Control Bioaerosols in Internal Environments

“…The data of the inhibition halos are in agreement with the data presented in the literature. Syafiuddin et al (Nurul Aini et al, 2019 ) obtained inhibition data of 7.7 mm and 10 mm for Bacillus cereus and E. coli , respectively, using silver nanoparticles produced with the natural oxidizing agent Carica papaya . However, using the agents Manihot esculenta and Morinda citrifolia , no inhibition halo was observed (Nurul Aini et al, 2019 ).…”

“…Syafiuddin et al (Nurul Aini et al, 2019 ) obtained inhibition data of 7.7 mm and 10 mm for Bacillus cereus and E. coli , respectively, using silver nanoparticles produced with the natural oxidizing agent Carica papaya . However, using the agents Manihot esculenta and Morinda citrifolia , no inhibition halo was observed (Nurul Aini et al, 2019 ). Aini et al (Nurul Aini et al, 2019 ) studied the antibacterial capacity of silver nanoparticles produced by the extracts of Talinum triangulare , Ageratum conyzoides , and Mikania micrantha and obtained values of inhibition halo for the microorganism E. coli of 2.35 ± 0.35, 1.27 ± 0.06, and 1.3 ± 0.5, respectively.…”

Toward a comprehensive understanding of textiles functionalized with silver nanoparticles

“…Nanomaterials are intended to enhance textile features such as self‐cleaning, water‐repellent and dirt‐repellent, antimicrobial, conductive, and antistatic properties, and decreased gas permeability and flammability . Silver nanoparticles (AgNPs) are a class of nanomaterials that have been hugely explored because of their remarkable features such as physical and mechanical . AgNPs have been recognized to have several properties such as antibacterial, antifungal, anticancer, and anti‐inflammatory.…”

“…[8] Silver nanoparticles (AgNPs) are a class of nanomaterials that have been hugely explored because of their remarkable features such as physical and mechanical. [9][10][11][12][13][14][15][16] AgNPs have been recognized to have several properties such as antibacterial, antifungal, anticancer, and anti-inflammatory.…”