Synthesis, Characterization and Antibacterial Activity of AgNPs by Using Leaf Extract of Acmella Oleracea

Table of Contents

1.0 Introduction

2. Silver Nanoparticles

2.0 Materials and Methods

2.1. Materials

2.2 Methodology

3.0 Result and Discussion

3.1. Phytochemical analysis of A. oleracea Leaf Extract

3.2. Characterization of AgNPs by UV-Vis spectroscopy

3.3. Fourier transforms infrared spectroscopy (FT-IR) analysis

3.4. Field Emission Scanning Electron Microscope (FESEM) analysis

3.5. Antibacterial Assays

4.0 Conclusion

Research Objectives and Themes

This study aims to develop a cost-efficient, eco-friendly, and safe method for the green synthesis of silver nanoparticles (AgNPs) utilizing the leaf extract of the medicinal plant Acmella oleracea, while evaluating their morphological characteristics and antibacterial efficacy.

• Green synthesis of silver nanoparticles using plant-mediated biological routes
• Phytochemical analysis of Acmella oleracea leaf extracts
• Material characterization via UV-Vis, FTIR, and FESEM techniques
• Assessment of antibacterial and antioxidant activities
• Optimization of nanoparticle stability and morphological control

Excerpt from the Book

Summary of Chapters

1.0 Introduction: Provides an overview of nanotechnology, defining nanoparticles and contrasting chemical synthesis methods with sustainable, plant-mediated green synthesis approaches.

2. Silver Nanoparticles: Discusses the unique properties of AgNPs, their industrial and medical applications, and reviews previous research on green synthesis using various plant extracts.

2.0 Materials and Methods: Details the collection of Acmella oleracea leaves and outlines the experimental protocols for preparing plant extracts and synthesizing silver nanoparticles.

2.1. Materials: Lists the specific source, location of plant collection, and technical-grade chemicals utilized in the synthesis process.

2.2 Methodology: Describes the specific reduction process, centrifugation, and purification steps taken to yield stable AgNPs.

3.0 Result and Discussion: Analyzes the experimental data, presenting findings on the synthesis success and chemical composition of the obtained particles.

3.1. Phytochemical analysis of A. oleracea Leaf Extract: Reports the presence of active secondary metabolites in the leaf extract responsible for the reduction of silver ions.

3.2. Characterization of AgNPs by UV-Vis spectroscopy: Explains the confirmation of AgNP formation through surface plasmon resonance peaks observed at 459 nm.

3.3. Fourier transforms infrared spectroscopy (FT-IR) analysis: Identifies the functional groups present on the nanoparticle surface that facilitate stabilization and reduction.

3.4. Field Emission Scanning Electron Microscope (FESEM) analysis: Details the morphological findings, confirming that the synthesized particles are spherical and within the size range of 36-45 nm.

3.5. Antibacterial Assays: Presents the efficacy results of the AgNPs against E. coli compared to standard antibiotics.

4.0 Conclusion: Sums up the viability of A. oleracea as an efficient, eco-friendly resource for future large-scale medical and industrial nanoparticle applications.

Keywords

Silver nanoparticles, Characterization techniques, Antibacterial activity, Antioxidant activity, Phytochemical Properties, Green synthesis, Acmella oleracea, Nanotechnology, UV-Vis spectroscopy, FTIR analysis, FESEM, Biological synthesis, Sustainable chemistry

Frequently Asked Questions

What is the primary focus of this research?

The research focuses on the green synthesis of silver nanoparticles using the leaf extract of Acmella oleracea as an environmentally friendly alternative to conventional chemical synthesis.

What are the central thematic areas?

The study covers nanotechnology, plant-mediated biosynthesis, analytical characterization, and the assessment of antibacterial/antioxidant properties.

What is the main research objective?

The objective is to establish a safe, cost-effective, and reproducible biological method for synthesizing stable silver nanoparticles using medicinal plant resources.

Which scientific methods are utilized?

The paper employs UV-Vis spectroscopy, Fourier Transform Infra-red (FTIR) spectroscopy, and Field Emission Scanning Electron Microscopy (FESEM) for characterization, alongside disc diffusion methods for antibacterial testing.

What does the main part of the work cover?

The main part encompasses the extraction methodology, chemical testing of the phytochemical content, and systematic analysis of nanoparticle morphology and antimicrobial efficacy.

What are the key descriptive terms for this work?

Key terms include green synthesis, silver nanoparticles, Acmella oleracea, and biomedical efficacy.

How does Acmella oleracea contribute to the synthesis process?

The leaf extract of Acmella oleracea acts as a natural reducing and capping agent due to its high content of secondary metabolites, which facilitates the reduction of Ag+ ions into stable silver nanoparticles.

What were the morphological findings of the synthesized nanoparticles?

FESEM analysis revealed that the synthesized particles were spherical, smooth-surfaced, and possessed an average size range between 36 and 45 nm.

How did the AgNPs perform against bacteria?

The synthesized AgNPs exhibited efficient antibacterial activity, showing stronger inhibitory effects against tested pathogens compared to standard conventional antibiotics.