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Kohsakowski S, Gökce B, Tanabe R, et al. Target geometry and rigidity determines laser-induced cavitation bubble transport and nanoparticle productivity - a high-speed videography study. Phys Chem Chem Phys. 2016;18(24):16585-93doi: 10.1039/c6cp01232a.
Kohsakowski, S., Gökce, B., Tanabe, R., Wagener, P., Plech, A., Ito, Y., & Barcikowski, S. (2016). Target geometry and rigidity determines laser-induced cavitation bubble transport and nanoparticle productivity - a high-speed videography study. Physical chemistry chemical physics : PCCP, 18(24), 16585-93. https://doi.org/10.1039/c6cp01232a
Kohsakowski, Sebastian, et al. "Target geometry and rigidity determines laser-induced cavitation bubble transport and nanoparticle productivity - a high-speed videography study." Physical chemistry chemical physics : PCCP vol. 18,24 (2016): 16585-93. doi: https://doi.org/10.1039/c6cp01232a
Kohsakowski S, Gökce B, Tanabe R, Wagener P, Plech A, Ito Y, Barcikowski S. Target geometry and rigidity determines laser-induced cavitation bubble transport and nanoparticle productivity - a high-speed videography study. Phys Chem Chem Phys. 2016 Jun 28;18(24):16585-93. doi: 10.1039/c6cp01232a. Epub 2016 Jun 07. PMID: 27273693.
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Phys Chem Chem Phys. 2016 Jun 28;18(24):16585-93. doi: 10.1039/c6cp01232a. Epub 2016 Jun 07.

Target geometry and rigidity determines laser-induced cavitation bubble transport and nanoparticle productivity - a high-speed videography study.

Physical chemistry chemical physics : PCCP

Sebastian Kohsakowski, Bilal Gökce, Rie Tanabe, Philipp Wagener, Anton Plech, Yoshiro Ito, Stephan Barcikowski

Affiliations

  1. University of Duisburg-Essen, Technical Chemistry I and Center of Nanointegration Duisburg-Essen (CENIDE), Universitaetsstrasse 7, Essen, D-45141 Germany. [email protected].

PMID: 27273693 DOI: 10.1039/c6cp01232a

Abstract

Laser-induced cavitation has mostly been studied in bulk liquid or at a two-dimensional wall, although target shapes for the particle synthesis may strongly affect bubble dynamics and interfere with particle productivity. We investigated the dynamics of the cavitation bubble induced by pulsed-laser ablation in liquid for different target geometries with high-speed laser microsecond videography and focus on the collapse behaviour. This method enables us observations in a high time resolution (intervals of 1 μs) and single-pulse experiments. Further, we analyzed the nanoparticle productivity, the sizes of the synthesized nanoparticles and the evolution of the bubble volume for each different target shape and geometry. For the ablation of metal (Ag, Cu, Ni) wire tips a springboard-like behaviour after the first collapse is observed which can be correlated with vertical projectile motion. Its turbulent friction in the liquid causes a very efficient transport and movement of the bubble and ablated material into the bulk liquid and prevents particle redeposition. This effect is influenced by the degree of freedom of the wire as well as the material properties and dimensions, especially the Young's modulus. The most efficient and largest bubble movement away from the wire was observed for a thin (500 μm) silver wire with velocities up to 19.8 m s(-1) and for materials with a small Young's modulus and flexural rigidity. We suggest that these observations may contribute to upscaling strategies and increase of particle yield towards large synthesis of colloids based on targets that may continuously be fed.

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