20.500.12556/RUL-148207 Evidence of laser-induced nanobubble formation mechanism in water Principles of laser-induced nanobubble formation in water are studied and presented. Nanobubbles were generated by laser light at intensities below threshold for laser-induced breakdown and subsequently expanded by a rarefaction wave to facilitate their observation and analysis. Different methods were used to study nanobubble formation and characteristics. Firstly, probability of nanobubble formation as a function of water sample purity was examined. Secondly, relation between laser fluence at different wavelengths and the number of generated nanobubbles was investigated. Thirdly, measurements of nanobubble lifetime were conducted indicating a contradiction to the Epstein-Plesset equation-based prediction of free bubble dissociation. Accumulated evidence suggests that the presence of physical impurities is a prerequisite for nanobubble formation. Consequently, a lack of impurities results in the absence of nanobubbles in contrast to assumptions by existing studies. The findings presented in this paper provide new insights into the fundamental properties of laser-induced nanobubbles in water. laser-induced bubbles nanobubbles bubble nucleation shock waves Epstein-Plesset equation lasersko inducirani mehurčki nanomehurčki nukleacija mehurčkov udarni valovi Epstein-Plessetova enačba true false true Angleški jezik Slovenski jezik Članek v reviji 2023-08-01 15:39:31 2023-08-01 15:39:40 2024-02-05 03:42:49 0000-00-00 00:00:00 2023 0 0 9 str. Vol. 99, art. 106537 Oct. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.528 1350-4177 10.1016/j.ultsonch.2023.106537 160337923 1-s2.0-S1350417723002493-main.pdf 1-s2.0-S1350417723002493-main.pdf 1 961AE2DB6BC916DE2B17423D6C3E4DD0 3f01d288132f5949f75000c15c82ff5a75f942ac9ad7ab50d2e91653b08c9406 542aaf72-c1aa-11ee-9ac8-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=180493 https://www.sciencedirect.com/science/article/pii/S1350417723002493 1 e40f2ff7-3070-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=172223 Fakulteta za strojništvo 0 0 0