Influence of the target material on secondary plasma formation underwater and its laser induced breakdown spectroscopy (LIBS) signal

Gavrilović, M. R.; Lazic, V.; Jovičević, S.

doi:10.1039/c6ja00300a

Cited by 14 publications

(4 citation statements)

References 35 publications

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“…With lifetimes up to several hundred microseconds, the cavitation bubble exceeds the lifetime of the plasma by far. However, in some cases, the formation of a secondary plasma with long-lasting optical emission signals (450 μs for Al [216] and 650 μs for Al 2 O 3 [217]) inside the growing cavitation bubble is discussed. In addition, Sasaki et al showed that discharge effects occur inside the cavitation bubble after more than 100 μs by incorporating an electrode near the cavitation bubble boundary [190] indicating that discharge dynamics indicating that plasma dynamics are still possible at these time scales.…”

Section: Dynamic Behavior Of the Cavitation Bubblementioning

confidence: 99%

Review on experimental and theoretical investigations of the early stage, femtoseconds to microseconds processes during laser ablation in liquid-phase for the synthesis of colloidal nanoparticles

Kanitz

Kalus

Gurevich

et al. 2019

Plasma Sources Sci. Technol.

149

112

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Laser ablation in liquid-phase (LAL) has been developed since the 1990s, but the interest in laser synthesis of colloids has emerged in the last decade due to a significant improvement in the production rate, proven comparative advantages in biomedical and catalysis applications, and recent commercialization. However, the method relies on highly transient phenomena, so that the fundamental understanding lacks behind the LAL synthesis refinement research. The complexity of the physics and chemistry involved has led to experimental and theoretical investigations that attempt to provide a basic description of the underlying processes but face the challenge of temporal and spatial resolution as well as non-equilibrium conditions. It appears that the processes occurring at the early time scales, ranging from femtoseconds to several microseconds are critical in the definition of the final product. The review is mainly dedicated to the comprehensive description of the processes occurring at early time scales, which include the description of laser-matter interaction for ultrashort and short laser pulses, plasma formation processes as well as comparison of the measured plasma parameters at these time scales, and subsequent description of the cavitation bubble dynamics. Furthermore, the plasma and cavitation bubble chemistry are addressed, and their impact on the nanoparticle formation is emphasized.

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Section: Dynamic Behavior Of the Cavitation Bubblementioning

confidence: 99%

Review on experimental and theoretical investigations of the early stage, femtoseconds to microseconds processes during laser ablation in liquid-phase for the synthesis of colloidal nanoparticles

Kanitz

Kalus

Gurevich

et al. 2019

Plasma Sources Sci. Technol.

149

112

View full text Add to dashboard Cite

show abstract

“…Rui Zhou et al investigated the relationship between laser ablation quality and the gap distance of two split laser beams by a novel spatial double-pulse laser ablation system and the result shown that the laser ablation quality and efficiency could be enhanced as the gap distance is optimized at about 80 µm [33]. Saeki et al developed a transportable LIBS instrument coupled with a fiber to analyze the underwater debris in a nuclear reactor core by spouting the gases from the optical probe head into the water to ensure a gas dome is created between probe head and the solid sample, which make the plasma generated by LAL less restricted and result in stronger LIBS signals [34].…”

Section: Introductionmentioning

confidence: 99%

Spatial restriction on properties of nanosecond pulsed laser ablation of aluminum in water

Zhang¹,

Wu²,

Li³

et al. 2020

J. Phys. D: Appl. Phys.

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The evolution of plasma radiation, shock waves and the bubbles generated by laser ablation in liquids (LAL) has been investigated in spatial restriction conditions by the temporally resolved plasma radiation images and time-resolved laser shadowgraphy. No significant plasma enhancement effect is observed at the moments when two reflected waves converge in opposite directions. Two reasons may account for this phenomenon: one is that cavitation bubbles block the interaction between reflected waves and plasma, which prevents reflected waves from transmitting energy to the plasma; and the other is that the laser energy is significantly absorbed by the water medium and the emission of plasma decays rapidly in water. The results indicate that the plasma luminous intensity attenuates and lifetime decreases under restricted conditions, which is due to the existence of the moving breakdown model in the water. The Bjerknes effect of the wall on the bubbles leads to the asymmetry of the bubble evolution under restricted conditions. The dynamics of the first bubble generated by LAL is described in an analytic method with the Rayleigh-Plesset equation. The results further indicate Bjerknes force exerts little impact upon bubble evolution in the extension phase, but imposes huge effects at the shrinkage phase.

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“…The results also show that the delay value corresponding to the maximum intensity is different for different samples. It is related to the absorption process of laser energy and the ablation threshold of the sample materials [25].…”

Section: Spectral Characteristicsmentioning

confidence: 99%

“…Therefore, signal improvement is one of the vital issues for underwater LIBS. In previous literature of underwater LIBS, De Giacomo et al [22,23] and Gavrilovic et al [24,25] have reported a signal improvement using a double-pulse (two nanosecond pulses), meanwhile, Jabbar et al [6], Sakka et al [26] and Oguchi et al [27] have reported a signal improvement using a single-pulse with long-pulse-duration. The experimental results of these studies had shown that the reason for signal improvement is related to the cavitation bubble in an underwater environment.…”

Section: Introductionmentioning

confidence: 99%

Signal Improvement for Underwater Measurement of Metal Samples Using Collinear Long-Short Double-Pulse Laser Induced Breakdown Spectroscopy

et al. 2020

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We employed a collinear long-short double-pulse laser induced breakdown spectroscopy (LS-DP-LIBS) to detect the underwater metal samples. The emission spectra, time-resolved signal, plasma images and sound characteristics of plasma shockwaves are experimentally investigated in this work. The results show that the underwater signal of Al, Cu and Fe spectral lines are significantly improved by collinear LS-DP-LIBS with inter-pulse delay of 35 us. The mechanism of the signal improvement is considered to be the pre irradiation effect of the long pulse laser beam. In the collinear LS-DP-LIBS method, the long pulse first generates a cavitation bubble in water and provides a gaseous environment. Then the short pulse generates the plasma from the sample surface. The present experiments show that the collinear LS-DP-LIBS method offers a significant signal improvement in underwater measurement of metal samples. This new method has great potential in deep-sea exploration using LIBS.

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Influence of the target material on secondary plasma formation underwater and its laser induced breakdown spectroscopy (LIBS) signal

Abstract: The significant influence of the target material properties on subsequent plasma and bubble formation in underwater laser ablation is demonstrated through the examples of α-alumina and pure Al targets.

Cited by 14 publications

References 35 publications

Review on experimental and theoretical investigations of the early stage, femtoseconds to microseconds processes during laser ablation in liquid-phase for the synthesis of colloidal nanoparticles

Review on experimental and theoretical investigations of the early stage, femtoseconds to microseconds processes during laser ablation in liquid-phase for the synthesis of colloidal nanoparticles

Spatial restriction on properties of nanosecond pulsed laser ablation of aluminum in water

Signal Improvement for Underwater Measurement of Metal Samples Using Collinear Long-Short Double-Pulse Laser Induced Breakdown Spectroscopy

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