Gripe water-mediated green synthesis of silver nanoparticles and their applications in nonlinear optics and surface-enhanced Raman spectroscopy

E Kirubha,K Vishista,P K Palanisamy

doi:10.1007/s13204-014-0376-4

E Kirubha, K Vishista + Show 1 more

Open Access

https://doi.org/10.1007/s13204-014-0376-4

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Journal: Applied Nanoscience	Publication Date: Nov 8, 2014
Citations: 24	License type: CC BY 4.0

Affiliation: Anna University, Chennai

Abstract

In the present study, silver nanoparticles were synthesized from aqueous silver nitrate through a simple, eco-friendly and ‘green’ method using gripe water as reducing as well as stabilizing agent. Control over the dispersity of silver (Ag) nanoparticles was attained by altering the synthesis process. The size and morphology of the particles were perceived using high-resolution transmission electron microscope and the surface plasmon resonance of the prepared nanoparticles was observed by UV–VIS spectrum. Herein, we report the nonlinear optical behavior and surface-enhanced Raman spectroscopy of silver nanoparticles with different particle size and dispersity. The nonlinear optical behavior was studied by single beam Z-scan technique using tunable Ti: Sapphire mode-locked femtosecond laser as source. The nonlinear optical parameters such as the nonlinear refractive index, nonlinear absorption coefficient β and the third-order nonlinear susceptibility χ3 of the prepared Ag nanoparticles were obtained for various wavelengths by tuning the wavelength of the laser from 700 to 950 nm. Surface-enhanced Raman spectroscopy (SERS) is an inspiring phenomenon especially in the case of silver nanoparticles. The as-synthesized silver nanoparticles show huge enhancements in the order of 109 in the Raman spectrum of rhodamine 6G dye.

Highlights

Metal nanoparticles have gained interest mainly because of their size- and shape-dependent electronic and optical properties (Kelly et al 2003)
We report a complete green synthesis of Ag nanoparticles using gripe water as environmentally benign reducing as well as nontoxic stabilizing agent adopting the procedure followed for the synthesis of Au nanoparticles (Kirubha and Palanisamy 2013)
The spectra were recorded for every 15 min and it was observed that up to 45 min there was no formation of nanoparticles as indicated by the flat line, while the spectrum taken after 60 min exhibited SPR

Summary

Introduction

Metal nanoparticles have gained interest mainly because of their size- and shape-dependent electronic and optical properties (Kelly et al 2003). We report the nonlinear optical behavior and surface-enhanced Raman spectroscopy of silver nanoparticles with different particle size and dispersity. The nonlinear optical parameters such as the nonlinear refractive index, nonlinear absorption coefficient b and the third-order nonlinear susceptibility v3 of the prepared Ag nanoparticles were obtained for various wavelengths by tuning the wavelength of the laser from 700 to 950 nm.

Results

Conclusion