Green Synthesis of Noble Metal Nanoparticles: Nonlinear Optics and Applications

Authors

  • Fryad Z. Henari Department of Medical Sciences, Royal College of Surgeons in Ireland - Bahrain, Bahrain
  • G. Roshan Deen Department of Medical Sciences, Royal College of Surgeons in Ireland - Bahrain, Bahrain

DOI:

https://doi.org/10.47852/bonviewJOPR42023911

Keywords:

Gum Arabic, gold-silver nanoparticles, particle size calculation, nonlinear property, optical limiting, optical switching

Abstract

This study presents a green method for synthesising gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs) employing Gum Arabic extract as a reducing and stabilising agent. The synthesised nanoparticles are characterised using UV-Vis absorption spectroscopy and transmission electron microscopy (TEM). The visible colour change and the presence of surface plasmon resonance (SPR) peaks confirmed the formation of silver and gold nanoparticles. The size of the nanoparticles was determined from the UV-Vis spectra data, and the results were compared to sizes measured by TEM. The nonlinear refraction (n2) and nonlinear absorption (β) coefficient of AgNPs and AuNPs at 488 and 514 nm were investigated under continuous wave (CW) mode excitation using the Z-scan technique. By fitting the experimental data to the Z-scan theoretical equations, the nonlinear refraction index and the nonlinear absorption coefficient were found. The origin of the nonlinearities was discussed, and it was proposed to be of thermal effect for the nonlinear refractive index and Reverse Saturation Absorption (RSA) for nonlinear absorption. Optical limiting and switching were demonstrated by taking advantage of the samples' nonlinear optical characteristics.

 

Received: 22 July 2024 | Revised: 25 September 2024 | Accepted: 26 November 2024

 

Conflicts of Interest

The authors declare that they have no conflicts of interest to this work.

 

Data Availability Statement

Data are available from the corresponding author upon reasonable request.

 

Author Contribution Statement

Fryad Z. Henari: Conceptualization, Methodology, Software, Validation, Formal analysis, Investigation, Resources, Data curation, Writing - original draft, Writing - review & editing, Visualisation, Supervision, Project administration. G. Roshan Deen: Conceptualization, Software, Formal analysis, Resources, Data curation, Visualisation.


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Published

2024-12-03

Issue

Section

Research Articles

How to Cite

Henari, F. Z. ., & Deen, G. R. (2024). Green Synthesis of Noble Metal Nanoparticles: Nonlinear Optics and Applications. Journal of Optics and Photonics Research. https://doi.org/10.47852/bonviewJOPR42023911