Time-resolved photography of the plasma-plume and ejected particles in laser ablation of polytetrafluoroethylene
2000; Institute of Physics; Volume: 51; Issue: 6 Linguagem: Inglês
10.1209/epl/i2000-00391-2
ISSN1286-4854
AutoresN. Huber, J. Gruber, N. Arnold, J. Heitz, D. Bäuerle,
Tópico(s)Laser-Ablation Synthesis of Nanoparticles
ResumoKrF-excimer laser ablation of sintered-powder PTFE targets is successfully used for the deposition of high-quality thin films. The mechanism is based on the high extinction of the pressed-powder targets which causes more efficient dissipation of the incident laser-light energy. As a result, a strongly forward-directed jet of PTFE particles is generated. This jet is investigated by means of a gated ICCD-camera. While the expansion of the visible plume starts with the laser pulse and lasts for about 10 μs, the particle jet can be observed within a time interval between about 5 μs and more than 100 μs after the laser pulse.
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