Wavelength Effect on Gold Nanoparticles Fabrication in Picosecond Laser Ablation and Evaluation of SERS Performance in Explosive Detection

Chandu Byram,Sree Sathya Bharathi Moram,Venugopal Rao Soma

doi:10.1007/978-981-15-9259-1_114

Wavelength Effect on Gold Nanoparticles Fabrication in Picosecond Laser Ablation and Evaluation of SERS Performance in Explosive Detection

Chandu Byram, Sree Sathya Bharathi Moram + Show 1 more

https://doi.org/10.1007/978-981-15-9259-1_114

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Publication Date: Jan 1, 2021

Citations: 1

Affiliation: University of Hyderabad

#Picosecond Laser Ablation #Ablation Yields + Show 8 more

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Abstract

Gold nanoparticles (NPs) were fabricated in distilled water using picosecond (30 ps, 10 Hz) laser ablation technique at 1064 nm, 532 nm, 355 nm to investigate the effect of laser wavelength on particle size and ablation efficiency. The NPs mean sizes and ablation yields were observed to increase with increase in the laser wavelength and the reasons are explained by considering the self-absorption effects of the NPs. Further, the SERS performance of the fabricated NPs were evaluated by detecting an explosive molecule (3-Nitro-1, 2, 4-triazol-5-one, NTO). Higher enhancement factors (EFs ~ 105) were noticed for the NPs prepared at 1064 nm.

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