Emission and stability improvement of AlO molecular bands in NELIBS using laser pretreatment

Abstract

In this paper, a fiber laser marking machine was used to pretreat an Al plate, and then a Au nanoparticle (Au NP) solution was dripped on the surface of the pre-treated plate to study the effect of the laser pretreatment assisted-nanoparticle-enhanced laser-induced breakdown spectroscopy technique on the emission and stability of the AlO molecular bands (B²∑⁺ − X²∑, Δν = 0) in the Al plasma. The results showed that laser pretreatment significantly improved the emission and stability of the AlO molecular bands. Therefore, this paper demonstrates the potential of laser pretreatment in improving analytical sensitivity in LIBS.