Effect of gold nanoparticle concentration on spectral emission of AlO molecular bands in nanoparticle-enhanced laser-induced Al plasmas

Abstract

Metal nanoparticles (NPs) for enhancing the signal intensity of laser-induced breakdown spectroscopy (LIBS) have received increasing attention in molecule spectroscopy. This study investigated the effect of gold nanoparticle concentration on...

Effect of laser pulse energy on atomic lines and molecular bands in femtosecond LIBS of aluminum

“…The observed Al (I) spectra consist of 394.40 nm and 396.15 nm transitions from the configurations of 3s 2 3p-3s 2 4s [25]. Additionally, the observed AlO molecular bands are B 2 Σ + − X 2 Σ + (∆ν = 0) transitions [26,27]. Figures 2(a here, k 0 = 2π/λ 0 is the wave number, λ 0 is laser wavelength, r 0 is the beam radius, P in is the initial power, P cr = 3.77λ 2 0 / 8πn 0 n 2 is the critical power, n 0 is linear refractive index and n 2 is nonlinear Kerr coefficient.…”

Elemental analysis of liquid samples by nanoparticle-enhanced laser-induced breakdown spectroscopy: using ordered nano-arrays with a tunable nanoparticle size and inter-particle distance

“…The analytical performance of NELIBS has a close relationship with the shape, size, inter-particle distance and distribution uniformity of NPs. 14,22,23,27 The research results of Zita Salajková et al showed that when the surface concentration of NPs was optimized, the size of NPs had less effect on the signal enhancement. 22 In a recent report, 23 Marcella Dell'Aglio et al investigated the effect of different shapes of NPs on the analytical performance of NELIBS and showed that once the deposition concentration was optimized for the shape of the NPs, the different NPs all had similar signal enhancement.…”

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

“…Keerthi et al 26 rapidly and sensitively detected trace Cu, Pb and Cd elements in liquid samples by in situ synthesis of a low-cost NELIBS substrate. Zhang et al 27,28 used Au NPs to enhance the emission intensity of AlO molecules, and quantitatively analyzed heavy metal elements in water on this basis, and found that the limits of detection (LoD) of Pb and Cr elements were reduced from 33.91 and 16.56 ng mL −1 to 19.87 and 10.12 g mL −1 . Ye et al 29 found that metal NPs signicantly enhanced the signal intensity of polymer molecules.…”