In situmeasurement of gold nanoparticle production

Mohd Syafiq Affandi,Noriah Bidin,Mohammed Al-Azawi,Muhammad Safuan Abd Aziz,Waskito Nugroho,Mundzir Abdullah

doi:10.1117/1.jnp.9.093089

Abstract

The closeness of the experimental and theoretical values enables the development of an in situ characterization technique to monitor and analyze the production of gold nanoparticles (NPs), overcoming the use of high-end and expensive instrumentation. Gold NPs below the radius size of 10 nm were successfully synthesized in accordance with a few working parameters of pulse laser ablation in a liquid technique. In this report, the size, shape, concentration, and aggregation properties of gold NPs were estimated by the Mie–Gans model based on a reliable and interactive real-time absorption spectroscopy. The major features can be an important means toward determination of efficient process measures, productivity of gold NPs generated, and efficiency of the mass ablation rate. The accuracy in the measurement is confirmed via transmission electron microscopy analysis.

Highlights

Nanoparticles (NPs) of noble metal, especially gold (Au) NPs, represent an important class, largely investigated to date because of their visible plasmon frequencies and minimal reactivity
The aim of this paper is to introduce an in situ analysis by monitoring and controlling the formation of AuNPs production via a Pulse laser ablation in liquid (PLAL) system
Since the surface plasmon absorption (SPA) of AuNPs is strongly dependent on the average size and concentration, UV-Vis spectroscopy enables one to characterize the content of Au suspension by fitting the spectra according to the Mie–Gans model

Summary

Introduction

Nanoparticles (NPs) of noble metal, especially gold (Au) NPs, represent an important class, largely investigated to date because of their visible plasmon frequencies and minimal reactivity. Pulse laser ablation in liquid (PLAL) has recently become one of fascinating top-down approaches for its simplicity in generating fine micro/nanoparticles with an outstanding purity and highly stable colloids.[1,2,3] Many studies have been carried out to improve the structure and morphology of gold colloids by engaging several processing elements,[4] including laser parameters, liquid species, physical conditions, and chamber design When it comes to characterizing the AuNPs, sophisticated and expensive microscopic techniques such as transmission electron microscopy (TEM), atomic force microscopy, and scanning electron microscopy are often used. Since the surface plasmon absorption (SPA) of AuNPs is strongly dependent on the average size and concentration, UV-Vis spectroscopy enables one to characterize the content of Au suspension by fitting the spectra according to the Mie–Gans model

Objectives

Results

Conclusion