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J Phys Chem B. 2019 Feb 28;123(8):1869-1880. doi: 10.1021/acs.jpcb.8b11087. Epub 2019 Feb 14.

The Effect of Gold Nanoparticle Concentration and Laser Fluence on the Laser-Induced Water Decomposition.

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Prokhorov General Physics Institute of the Russian Academy of Sciences , 38 Vavilova St. , Moscow 119991 , Russia.
Institute of Cell Biophysics of the Russian Academy of Sciences , 3 Institutskaya St. , Pushchino, Moscow Region 119991 , Russia.
Moscow Institute of Physics and Technology , Institutsky Lane 9 , Dolgoprudny, Moscow Region 141700 , Russia.
Institute of Biology and Biomedicine , Lobachevsky State University of Nizhny Novgorod , 23 Gagarin Ave. , Nizhny Novgorod 603950 , Russia.
Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences , 49 Leninskiy Ave. , Moscow 119334 , Russia.
Mari State University , 1 Lenina pl. , Yoshkar-Ola , Mari El, 424001 , Russia.
Moscow Regional Research and Clinical Institute (MONIKI) , 61/2 Shchepkina St. , Moscow 129110 , Russia.


This Article covers the influence of the concentration of gold nanoparticles on laser-induced water decomposition. It was established that addition of gold nanoparticles intensifies laser-induced water decomposition by almost 2 orders of magnitude. The water decomposition rate was shown to be maximal at a nanoparticle concentration around 1010 NP/mL, whereas a decrease or increase of nanoparticle concentration leads to a decrease of water decomposition rate. It was demonstrated that, if the concentration of nanoparticles in water-based colloid was less than 1010 NP/mL, laser irradiation of the colloid caused formation of molecular hydrogen, hydrogen peroxide, and molecular oxygen. If the concentration of nanoparticles exceeded 1011 NP/mL, only two products, molecular hydrogen and hydrogen peroxide, were formed. Correlations between the water decomposition rate and the main optical and acoustic parameters of optical breakdown-generated plasma were investigated. Variants of laser-induced decomposition of colloidal solutions of nanoparticles based on organic solvents (ethanol, propanol-2, butanol-2, diethyl ether) were also analyzed.


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