Improvement in signal sensitivity and repeatability using copper nanoparticle-enhanced laser-induced breakdown spectroscopy

Nanoparticle-enhanced laser-induced breakdown spectroscopy for serum element analysis using an Ag NP-coated filter paper substrate

“…The fact that the NELIBS plasmas have almost the same electron temperature and electron density as normal LIBS has also been documented previously in several works. 12,40,51,52 Meanwhile, the results also indicate that the plasma parameters are not strongly affected by the interaction between the Ag NPs and proteins, such as the protein corona, which has also been demonstrated in a study on protein corona and Au NPs. 39…”

“…The fact that the NELIBS plasmas have almost the same electron temperature and electron density as normal LIBS has also been documented previously in several works. 12,40,51,52 Meanwhile, the results also indicate that the plasma parameters are not strongly affected by the interaction between the Ag NPs and proteins, such as the protein corona, which has also been demonstrated in a study on protein corona and Au NPs. 39 Moreover, according to the simulation of the Cu I emission line by Soumyashree and Kumar, 53 when the electron density is in the order of 1 ×10 17 cm −3 and the electron temperature is within the range of 1-1.4 × 10 4 K, the EF would decrease with an increase in electron temperature, which also explains the downward trend of EF with decreasing Ag NPs concentration (with slightly increased T e ) in Fig.…”

Elemental analysis of levitated solid samples by microwave-assisted laser induced breakdown spectroscopy

“…Therefore, the MW-LIBS-Levitation enhancement mechanism is independent of ablation efficiency and thus differs from the double pulse-LIBS enhancement mechanism. [47][48][49][50] To investigate the repeatability, 300 single-shot spectra of MW-LIBS-Levitation were recorded. It was observed that 9 of these laser pulses produced no ablation.…”

“…Therefore, the MW-LIBS–Levitation enhancement mechanism is independent of ablation efficiency and thus differs from the double pulse-LIBS enhancement mechanism. 47–50…”

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

“…8 To enhance the sensitivity of LIBS, researchers have proposed various strategies, including double-pulse LIBS, 9 spark-discharge LIBS, 10 LIF-LIBS, 11 spatial or magnetic connement 12,13 and NELIBS. [14][15][16][17] In these approaches, NELIBS can greatly enhance signal intensity with simple sample preparation, making it a promising analytical method.…”