Effect of applied voltage and inter-pulse delay in spark-assisted LIBS

Robledo‐Martinez, A.; Sobral, H.; Garcia-Villarreal, A.

doi:10.1016/j.sab.2018.03.002

Cited by 26 publications

(4 citation statements)

References 44 publications

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“…The electrons moved rapidly toward the anode of the discharge device under the action of the electric field force. Subsequently, a reheated discharge occurred, the discharge provided more energy to the plasma [32,44,45]. The temperature and electron density in the plasma with the spark discharge were higher than those in the plasma without the spark discharge.…”

Section: Resultsmentioning

confidence: 99%

Time-resolved spectroscopy of femtosecond laser-induced Cu plasma with spark discharge

Wang

Chen

et al. 2019

Plasma Sci. Technol.

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The combination of spark discharge and laser-induced breakdown spectroscopy (LIBS) is called spark discharge assisted LIBS. It works under laser-plasma triggered spark discharge mode, and shows its ability to enhance spectral emission intensity. This work uses a femtosecond laser as the light source, since femtosecond laser has many advantages in laser-induced plasma compared with nanosecond laser, meanwhile, the study on femtosecond LIBS with spark discharge is rare. Time-resolved spectroscopy of spark discharge assisted femtosecond LIBS was investigated under different discharge voltages and laser energies. The results showed that the spectral intensity was significantly enhanced by using spark discharge compared with LIBS alone. And, the spectral emission intensity using spark discharge assisted LIBS increased with the increase in the laser energy. In addition, at low laser energy, there was an obvious delay on the discharge time compared with high laser energy, and the discharge time with positive voltage was different from that with negative voltage.

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Section: Resultsmentioning

confidence: 99%

Time-resolved spectroscopy of femtosecond laser-induced Cu plasma with spark discharge

Wang

Chen

et al. 2019

Plasma Sci. Technol.

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“…It was proved that using a coil with a length of 50 m and a resistance value of 50 to re-excite the plasma on the surface of the aluminum alloy could improve the signalto-noise ratio by an order of magnitude [101]. Martinez et al [102] also obtained enhancement of two orders of magnitude by applying a 600 kW electric pulse to assist LIBS [102]. Flame assist is another method to improve the spectral signal intensity of LIBS.…”

Section: Other Methodsmentioning

confidence: 99%

Improving the Detection Sensitivity for Laser-Induced Breakdown Spectroscopy: A Review

Dong

2020

Front. Phys.

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Laser-induced breakdown spectroscopy (LIBS) is fast, on-line, causes little sample damage, and can be applied in remote field locations. In recent years, LIBS has been widely used in many fields of scientific research for element detection. Further application of LIBS is limited by the strong matrix effect, poor repeatability, and relatively weak detection sensitivity. The detection sensitivity is an important factor and needs to be improved for LIBS detection of minor or trace elements in samples. A variety of methods have been developed to improve detection sensitivity of LIBS. In this invited review paper, we discuss improvements in the LIBS detection sensitivity achieved with physical enhancement methods, chemical enhancement methods, mathematical methods, and combinations of multiple methods. We discuss the enhancement mechanisms, sensitivity improvements, configurations, and effects of key factors for various methods. The advantages, disadvantages, and real-time capabilities of these methods are reviewed. Finally, new trends and future perspectives for LIBS as an efficient analytical tool are discussed.

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“…Due to its vast applications in many fields, improvement in the sensitivity of this technique has become the main concern. For this purpose, many ideas and techniques have been proposed and experimented, among which are the multiple-pulse LIBS [8][9], application of magnetic and electric fields during LIBS [10][11],…”

Section: Introductionmentioning

confidence: 99%

Laser induced breakdown spectroscopy of aluminum incorporated with metallic nanoparticles

et al. 2022

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Laser-Induced Breakdown Spectroscopy is a promising spectroscopic technique with a vast spectrum of applications in fields concerned with identification and detection of elements. But it faces some limitations due to self-absorption, noise due to matrix effect and line broadening resulting in low emission signal. This research proposes LIBS signal enhancement by incorporation of metal nanoparticles (Cu, Mg, Au) on Al surface and compares their effect. The successful optical emissions enhancement is achieved as the emission intensities of Al-and Nalines of three coated samples are compared with those of uncoated Al. The Electron Temperature has been evaluated by Boltzmann plot and an increase in Electron Temperature has been observed with the incorporation of nanoparticles to the aluminum surface as compared to the untreated aluminum, due to more plasma emissions. The Electron Number Density of the aluminum plasma did not have much effect with the incorporation of Nanoparticles. The Local Thermal Equilibrium condition has been satisfied and checked by Mc Whirter's Criterion. The incorporation of metalnanoparticles can be declared as an effective method not only for LIBS signal enhancement but also better detection of trace elements which were not observed without the use of Nanoparticles.

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Effect of applied voltage and inter-pulse delay in spark-assisted LIBS

Cited by 26 publications

References 44 publications

Time-resolved spectroscopy of femtosecond laser-induced Cu plasma with spark discharge

Time-resolved spectroscopy of femtosecond laser-induced Cu plasma with spark discharge

Improving the Detection Sensitivity for Laser-Induced Breakdown Spectroscopy: A Review

Laser induced breakdown spectroscopy of aluminum incorporated with metallic nanoparticles

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