Impact of target-derived and ambient oxygen on gas-phase oxidation in laser ablation plumes
Stirling C. Wallace, Abdul Kalam Shaik, Mark C. Phillips, S. S. Harilal
Abstract
Gas-phase oxidation in a laser-produced plasma is significantly influenced by the availability of oxygen in and around the plume. In this study, we investigate the role of target-derived and ambient oxygen on AlO formation in plasmas generated from aluminum (Al) and Al 2 O 3 targets in air and argon, respectively. Our results highlight that gas-phase oxidation occurs early during the evolution of Al 2 O 3 plasmas in argon, in contrast to Al plasmas in air, where the initial exclusion of oxygen from the plume delays the chemical reactions.
Topics & Concepts
OpticsMaterials scienceOxygenLaser ablationAblationLaserPhase (matter)CombustionEnvironmental sciencePhysicsChemistryAerospace engineeringOrganic chemistryEngineeringQuantum mechanicsLaser-induced spectroscopy and plasmaAnalytical chemistry methods developmentDiamond and Carbon-based Materials Research