Balance of O 2 and H 2 content under laser-induced breakdown of aqueous colloidal solutions

Бармина, Е. В.; Simakin, Alexander V.; Шафеев, Г. А.

doi:10.1016/j.cplett.2017.04.045

Cited by 27 publications

(20 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2009). Atomic hydrogen and oxygen will largely recombine to form water but some molecular hydrogen and oxygen remain as long-lived gaseous products (Nikogosyan, Oraevsky & Rupasov 1983; Barmina, Simakin & Shafeev 2016, 2017). Unlike for single bubble sonoluminescence (SBSL), where a sequence of many acoustically driven oscillations allows for rectified diffusion of dissolved air into the bubble (Brenner et al.…”

Section: Theoretical Analysis and Numerical Methodsmentioning

confidence: 99%

Comprehensive analysis of spherical bubble oscillations and shock wave emission in laser-induced cavitation

et al. 2022

View full text Add to dashboard Cite

The dynamics of spherical laser-induced cavitation bubbles in water is investigated by plasma photography, time-resolved shadowgraphs and sensitive single-shot probe beam scattering that portrays the transition from initial nonlinear to late linear oscillations. The frequency of late oscillations yields the bubble's gas content. Numerical simulations with an extended Gilmore model using plasma size as input and oscillation times as fit parameter provide insights into experimentally not accessible bubble parameters and shock wave emission. Model extensions include a term covering the initial shock-driven acceleration of the bubble wall, an automated method determining shock front position and pressure decay and a complete energy balance for the partitioning of absorbed laser energy into vaporization, bubble and shock wave energy and dissipation through viscosity and condensation. These tools are used for analysing a scattering signal covering 102 oscillation cycles from a bubble with 36 μm maximum radius produced by a plasma with 1550 K average temperature. Predicted bubble wall velocities during expansion agree well with experimental data. Upon first collapse, most energy was stored in the compressed liquid around the bubble and radiated away acoustically. The collapsed bubble contained more vapour than gas and had a pressure of 13.5 GPa. The decay of the rebound shock wave pressure with radius r was initially $\mathrm{\ \propto }{r^{ - 1.8}}$ , and energy dissipation at the shock front heated the liquid near the bubble wall to temperatures above the superheat limit. The shock-induced temperature rise reduces damping during late bubble oscillations. Damping in first collapse increases significantly for small bubbles with less than 10 μm radius.

show abstract

Section: Theoretical Analysis and Numerical Methodsmentioning

confidence: 99%

Comprehensive analysis of spherical bubble oscillations and shock wave emission in laser-induced cavitation

et al. 2022

View full text Add to dashboard Cite

show abstract

“…We have examined 173 particles out of which 17% are of hollow morphology (see Figure S1(c)). The possible reason of their appearance could be attributed to the use of ethanol as solvent in which the ablation process yields H 2 and O 2 . The presence of H in the medium leads to the formation of cavities in nanoparticles by the release of H 2 .…”

Section: Resultsmentioning

confidence: 99%

Solvents Effect on the Morphology and Stability of Cu/CuO Nanoparticles Synthesized at High Fluence Laser Ablation

et al. 2019

View full text Add to dashboard Cite

Cu/CuO NPs were synthesized by ablating Cu target using nanosecond Nd:YAG pulsed laser operating at 1064 nm with 8 ns pulse duration in three different solvents viz: ethylene glycol (EG), deionized water (DI) and ethanol (Eth). The effects of these three solvents at high laser fluence of 40 J/cm 2 was investigated to study the stability and morphology of nanoparticles using microscopic and spectroscopic techniques. The morphology of these nanoparticles are dependent on the physical properties of solvents (like viscosity, conductivity, polarity and enthalpy) used in laser ablation. EG and DI shows tadpole and necklace like structure whereas in Eth hollow structures were observed. The crystallinity of nanoparticles were confirmed by HRTEM, SAED and XRD analysis. In all the three solvents the characteristic absorption and emission peaks of Cu and CuO nanoparticles were observed and have been elaborately discussed in this paper. In addition, the detailed growth kinematics of nanoparticles involved in the process of laser ablation technique have been highlighted.

show abstract

“…However, the time regime of the rebound/collapse of the bubble must also be considered but is often neglected as most studies focus on the primary cavitation bubble cycle. Within this context, several studies have demonstrated that water is decomposed during LAL resulting in the formation of molecular hydrogen, oxygen, and hydrogen peroxide [60–67] . The individual formation rates of these decomposition products depend strongly on the type of the ablated material.…”

Section: Introductionmentioning

confidence: 99%

“…Within this context, severals tudies have demonstrated that water is decomposedd uring LAL resultingi nt he formationo f molecular hydrogen, oxygen, andh ydrogen peroxide. [60][61][62][63][64][65][66][67] The individualf ormation rates of these decomposition products depend strongly on the type of the ablated material. The ablation of catalytically active materials (e.g.,P t) in water leads to high hydrogen peroxide formation rates.…”

Section: Introductionmentioning

confidence: 99%

How the Physicochemical Properties of the Bulk Material Affect the Ablation Crater Profile, Mass Balance, and Bubble Dynamics During Single‐Pulse, Nanosecond Laser Ablation in Water

Kalus

Barcikowski

Gökce

2021

Chemistry A European J

View full text Add to dashboard Cite

Understanding the key steps that drive the laser‐based synthesis of colloids is a prerequisite for learning how to optimize the ablation process in terms of nanoparticle output and functional design of the nanomaterials. Even though many studies focus on cavitation bubble formation using single‐pulse ablation conditions, the ablation efficiency and nanoparticle properties are typically investigated under prolonged ablation conditions with repetition rate lasers. Linking single‐pulse and multiple‐pulse ablation is difficult due to limitations induced by gas formation cross‐effects, which occur on longer timescales and depend on the target materials’ oxidation‐sensitivity. Therefore, this study investigates the ablation and cavitation bubble dynamics under nanosecond, single laser pulse conditions for six different bulk materials (Au, Ag, Cu, Fe, Ti, and Al). Also, the effective threshold fluences, ablation volumes, and penetration depths are quantified for these materials. The thermal and chemical properties of the corresponding bulk materials not only favor the formation of larger spot sizes but also lead to the highest molar ablation efficiencies for low melting materials such as aluminum. Furthermore, the concept of the cavitation bubble growth linked with the oxidation sensitivity of the ablated material is discussed. With this, evidence is provided that intensive chemical reactions occurring during the very early timescale of ablation are significantly enhanced by the bubble collapse.

show abstract

Balance of O 2 and H 2 content under laser-induced breakdown of aqueous colloidal solutions

Cited by 27 publications

References 4 publications

Comprehensive analysis of spherical bubble oscillations and shock wave emission in laser-induced cavitation

Comprehensive analysis of spherical bubble oscillations and shock wave emission in laser-induced cavitation

Solvents Effect on the Morphology and Stability of Cu/CuO Nanoparticles Synthesized at High Fluence Laser Ablation

How the Physicochemical Properties of the Bulk Material Affect the Ablation Crater Profile, Mass Balance, and Bubble Dynamics During Single‐Pulse, Nanosecond Laser Ablation in Water

Contact Info

Product

Resources

About