Investigation of Ag, Al 2 O 3 and TiO 2 nanoparticles effects as impurities in Laser Induced Breakdown in distilled water

Mahdieh, Mohammad Hossein; Jafarabadi, Marzieh Akbari; Syahkal, Mehran Safari; Mozaffari, Hossein

doi:10.1016/j.physleta.2017.05.037

Cited by 2 publications

(1 citation statement)

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“…The effect of impurities is especially noticeable when using metal nanoparticles-the process of optical breakdown of a liquid occurs several orders of magnitude more intense [22]. In this case, the concentration of nanoparticles in these processes plays a key role [4,23,24], while the morphology of nanoparticles [25], surface relief [26], size [27], solvent [28], impurities [29] can play a minor role. Some physical properties and processes accompanying optical breakdown can change depending on the type and concentration of gases dissolved in the liquid [30].…”

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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