Features of optical breakdown of aqueous colloidal solutions of ferric oxide (Fe2O3) nanoparticles occurring on individual or on two closely located nanoparticles

Baimler, Ilya V.; Simakin, Alexander V.; Chevokin, Viktor K.; Podvyaznikov, Vitaliy A.; Gudkov, Sergey V.

doi:10.1016/j.cplett.2021.138697

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…Changes in the generation of shock waves during optical breakdown, in turn, can directly affect the development of the breakdown plasma. For example, it was shown that cavitation bubbles with plasma are affected by shock waves and can move in space under the action of shock waves generated from neighboring breakdowns [32].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the laser-induced breakdown plasma, acoustic vibrations and dissociation processes of water molecules caused by laser breakdown of colloidal solutions containing Ni nanoparticles

Baymler

Simakin

Gudkov

2021

Plasma Sources Sci. Technol.

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In this work the process of optical breakdown under laser irradiation by nanosecond pulses with an energy of 650 mJ of aqueous solutions of Ni nanoparticles is investigated. A monotonic change in the number of breakdowns, the average distance between closest breakdowns, the average plasma size of an individual breakdown, the luminosity of a plasma flash, the intensity of acoustic signals, and the rate of formation of dissociation products - O2, H2, OH•, and H2O2 with an increase in the irradiation time was established. With an increase in the concentration of nanoparticles, the measured values change non-monotonically. The maximum luminosity of a plasma flash is observed at a nanoparticle concentration of 109 NP/ml and 1010 NP/ml and reaches 350 cd/m2. The maximum pressure at the shock front is 1.5–2 MPa at a nanoparticle concentration of 1010 NP/ml. The maximum rates of generation of O2, H2, OH• and H2O2 are observed at concentrations of 109 NP/ml and 1010 NP/ml. Correlation analysis of the studied physicochemical phenomena shows that the formation of molecular gases is associated with acoustic processes, and the formation of radical products and hydrogen peroxide correlates with the physicochemical properties of plasma.

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Section: Introductionmentioning

confidence: 99%

Investigation of the laser-induced breakdown plasma, acoustic vibrations and dissociation processes of water molecules caused by laser breakdown of colloidal solutions containing Ni nanoparticles

Baymler

Simakin

Gudkov

2021

Plasma Sources Sci. Technol.

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“…It was previously established that acoustic vibrations are caused by the expansion, collapse of the cavitation bubble, and its movement. The rate of such expansion can reach 15 km/s, and the velocity of relative displacement of the bubble can reach 4 km/s . In this case, the pressure at the front can reach hundreds of MPa …”

Section: Discussionmentioning

confidence: 99%

“…The rate of such expansion can reach 15 km/ s, 43 and the velocity of relative displacement of the bubble can reach 4 km/s. 44 In this case, the pressure at the front can reach hundreds of MPa. 45 The formation of hydrogen peroxide and hydroxyl radicals under the action of optical breakdown induced by laser radiation on terbium nanoparticles of various concentrations and degrees of oxidation has been studied (Figure 7).…”

Section: ■ Discussionmentioning

confidence: 99%

Laser-Induced Optical Breakdown of an Aqueous Colloidal Solution Containing Terbium Nanoparticles: The Effect of Oxidation of Nanoparticles

et al. 2022

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The influence of the number of oxidized terbium nanoparticles on the intensity of physicochemical processes occurring during optical breakdown in aqueous colloidal solutions of nanoparticles has been studied. It is shown that the effect of the number of oxidized terbium nanoparticles on the physicochemical processes occurring during optical breakdown depends significantly on the fluence of laser radiation. At a fluence of less than 100–110 J/cm2, plasma formation processes occur more intensively on less-oxidized (metal) nanoparticles. At a fluence of more than 100–110 J/cm2, the processes of plasma formation during optical breakdown occur much more intensively on more-oxidized nanoparticles. It has been established that the dependence of the rate of laser-induced decomposition of water on the concentration of nanoparticles is two-phase. The rate of generation of water decomposition products increases with an increase in the concentration of nanoparticles up to 109 NP/mL. With a further increase in the concentration of nanoparticles, the rate of generation of water decomposition products decreases. In this case, more than 99% of the decomposition products of water are formed due to the action of plasma, and the share of ultraviolet and ultrasound formed during optical breakdown is approximately 0.5% on each.

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“…The data on the size of nanoparticles obtained using a disk centrifuge were confirmed by the method of dynamic light scattering, using a DLS Malvern Zetasizer Ultra Red Label 10 (Malvern, UK) with multi-angle dynamic light-scattering technology (Malvern, PA, USA). The DLS data were obtained at several scattering angles; the data were calculated according to the algorithm proposed earlier [ 25 ]. The morphology of SeNPs was inspected using a 200FE TEM ((Carl Zeiss Microscopy GmbH, Jena, Germany).…”

Section: Methodsmentioning

confidence: 99%

Laser Ablation-Generated Crystalline Selenium Nanoparticles Prevent Damage of DNA and Proteins Induced by Reactive Oxygen Species and Protect Mice against Injuries Caused by Radiation-Induced Oxidative Stress

Gudkov,

Gao,

Simakin

et al. 2023

Materials

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With the help of laser ablation, a technology for obtaining nanosized crystalline selenium particles (SeNPs) has been created. The SeNPs do not exhibit significant toxic properties, in contrast to molecular selenium compounds. The administration of SeNPs can significantly increase the viabilities of SH-SY5Y and PCMF cells after radiation exposure. The introduction of such nanoparticles into the animal body protects proteins and DNA from radiation-induced damage. The number of chromosomal breaks and oxidized proteins decreases in irradiated mice treated with SeNPs. Using hematological tests, it was found that a decrease in radiation-induced leukopenia and thrombocytopenia is observed when selenium nanoparticles are injected into mice before exposure to ionizing radiation. The administration of SeNPs to animals 5 h before radiation exposure in sublethal and lethal doses significantly increases their survival rate. The modification dose factor for animal survival was 1.2. It has been shown that the introduction of selenium nanoparticles significantly normalizes gene expression in the cells of the red bone marrow of mice after exposure to ionizing radiation. Thus, it has been demonstrated that SeNPs are a new gene-protective and radioprotective agent that can significantly reduce the harmful effects of ionizing radiation.

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Features of optical breakdown of aqueous colloidal solutions of ferric oxide (Fe2O3) nanoparticles occurring on individual or on two closely located nanoparticles

Cited by 7 publications

References 19 publications

Investigation of the laser-induced breakdown plasma, acoustic vibrations and dissociation processes of water molecules caused by laser breakdown of colloidal solutions containing Ni nanoparticles

Investigation of the laser-induced breakdown plasma, acoustic vibrations and dissociation processes of water molecules caused by laser breakdown of colloidal solutions containing Ni nanoparticles

Laser-Induced Optical Breakdown of an Aqueous Colloidal Solution Containing Terbium Nanoparticles: The Effect of Oxidation of Nanoparticles

Laser Ablation-Generated Crystalline Selenium Nanoparticles Prevent Damage of DNA and Proteins Induced by Reactive Oxygen Species and Protect Mice against Injuries Caused by Radiation-Induced Oxidative Stress

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