Antibiofilm and cytotoxic potential of extracellular biosynthesized gold nanoparticles using actinobacteria <i>Amycolatopsis</i> sp. KMN

Nanoparticle synthesis from plant resources has recently gained significant impact due to its low cost, simple equipment requirements, and ease of availability. In this work, DR‐AgNPs were synthesized using bark extract of Delonix regia (D. regia) plant under microwave irradiation. The formation of DR‐AgNPs has been confirmed with UV–Vis, XRD, FTIR, FESEM, HRTEM, EDS, DLS, and zeta potential analysis. Catalytic and antioxidant activities were tested on synthesized spherical nanoparticles with a size range of 10–48 nm. The effects of pH and catalyst dosage on the methylene blue (MB) dye degradation were carried out. It was observed from the treatment results that 95% MB dye degradation efficiency was achieved within 4 min with a degradation rate constant of 0.772 min−1. The synthesized nanoparticles showed a strong antioxidant property when analyzed by a 2,2‐Diphenyl‐1‐picrylhydrazyl (DPPH) radical scavenging assay. The calculated IC50 value for DR‐AgNPs was 37.1 ± 0.12 μg mL−1. Therefore, DR‐AgNPs are excellent in both catalytic and antioxidant activities when compared to previously reported works. Highlights Green synthesis of silver nanoparticles (DR‐AgNPs) using Delonix regia bark extract. The catalytic activity of DR‐AgNPs is remarkable against Methylene Blue. DR‐AgNPs also have a strong DPPH radical antioxidant effect. Short degradation time, high degradation rate constant, and a good scavenging activity are key features of this study compared to previously reported works.

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Green synthesis of AgNPs using Delonix regia bark for potential catalytic and antioxidant applications

Bala

Rani

2023

Microscopy Res & Technique

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Green Fabrication of Nanomaterials Using Microorganisms as Nano-Factories

Eweis,

El-Raheem,

Ahmad

et al. 2024

J Clust Sci

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Nanoparticle synthesis under environmentally friendly conditions has been conducted utilizing natural resources in order to reduce the reliance on hazardous chemicals. For example, the utilization of microbial synthesis has enabled the production of nanoparticles that exhibit biocompatibility, stability, and safety. Microorganisms facilitate the growth of crystals while preventing aggregation. They serve as both reducing agents and capping agents by offering enzymes, peptides, poly(amino acids), polyhydroxyalkanoate, and polysaccharides. In this review, we present an overview of nanoparticle synthesis based on microorganisms including bacteria, fungi, algae, and actinobacteria, encompassing metals such as gold (Au), silver (Ag), platinum (Pt), palladium (Pd), copper (Cu), titanium dioxide ((TiO2), zinc oxide (ZnO), iron oxide (Fe2O3), and selenium (Se). The nanoparticles typically vary in size from 1 to 100 nm and exhibit various shapes including spherical, rod-shaped, triangular, cubic, and hexagonal shapes. Additionally, this review discusses the mechanisms behind the synthesis of metal nanoparticles by microorganisms, whether they occur intracellularly or extracellularly.

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Tackling breast cancer with gold nanoparticles: twinning synthesis and particle engineering with efficacy

Mal,

Chakraborty,

Mahapatra

et al. 2024

Nanoscale Adv.

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Antibiofilm and cytotoxic potential of extracellular biosynthesized gold nanoparticles using actinobacteria Amycolatopsis sp. KMN

Cited by 8 publications

References 61 publications

Green synthesis of AgNPs using Delonix regia bark for potential catalytic and antioxidant applications

Green synthesis of AgNPs using Delonix regia bark for potential catalytic and antioxidant applications

Green Fabrication of Nanomaterials Using Microorganisms as Nano-Factories

Tackling breast cancer with gold nanoparticles: twinning synthesis and particle engineering with efficacy

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