The influence of the fluid nature on femtosecond laser ablation properties of a SiO<sub>2</sub>/Si target and synthesis of ultrafine-grained Si nanoparticles
Niusha Lasemi, Christian Rentenberger, Gerhard Liedl, Dominik Eder
Abstract
-hexane can be associated with femtosecond laser-induced photolysis and pyrolysis of solvent molecules, as total energy deposition on the material may be reduced due to the formation of carbonaceous products. The roughened zones (average roughness of ∼400 nm) in circumferences of the ablated craters in 2-butanol may be related to a correlation between the erosive power of the vapour bubble collapse and higher pressure at the bubble wall in relatively high dynamic viscosity fluids. Furthermore, sputtering of a pristine surface by releasing nanoparticles from the collective collapse of up-flow vapour bubbles can also contribute to the generation of roughened regions.
Topics & Concepts
Laser ablationMaterials scienceNanoparticleAblationFemtosecondLaserChemical engineeringNanotechnologyOpticsAerospace engineeringPhysicsEngineeringLaser-Ablation Synthesis of NanoparticlesDiamond and Carbon-based Materials ResearchSilicon Nanostructures and Photoluminescence