| Autor: |
Rie Tanabe-Yamagishi, Shunsuke Komatsu, Yoshiro Ito, Yasutaka Hanada |
| Předmět: |
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| Zdroj: |
Journal of Laser Micro / Nanoengineering; Oct2022, Vol. 17 Issue 2, p89-93, 5p |
| Abstrakt: |
Laser ablation in liquid (LAL) is a well known metal-nanoparticle generation method. A laserinduced bubble is formed by LAL when the laser is focused on a metal surface immersed in a liquid. Although bubbles produced by the laser ablation in water expand and shrink a few times and then collapse, the bubbles generated on the sample surface in liquid polydimethylsiloxane (PDMS) retain their spherical shape for more than 10 min and can be used to manufacture fine structures via a postprocessing method. We observed the process of bubble formation in liquid PDMS using high-speed videography to study the bubble dynamics in detail. When a sintered cerium-doped yttrium aluminum garnet (YAG:Ce) pellet was used as an ablation target, photoluminescence from particles generated by laser ablation was observed under blue-light excitation. A comparison of shadowgraph and photoluminescence images revealed that the laser-induced bubbles were covered with a thin film of polymerized PDMS with YAG:Ce nanoparticles attached. After the polymerized thin film was ruptured, the inner gas-phase bubble floated upward. Light-emitting regions were observed at the film on the target surface and at the bottom of the bubble after the bubble floated upward. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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