Ablation de ZnO par laser UV (193 nm) : Nano-agregats en phase gazeuse
Igor Ozerov, Alexander V. Bulgakov, Dimitri N. Nelson, Ricardo Castell, Marc Sentis, Wladimir Marine
Abstract
The condensation of zinc oxide nano clusters produced in gas phase has been evidenced in the ablation of a ZnO solid target by a pulsed ArF laser. We compare the spatio-temporal evolution of the shape of ZnO ablated plasma plume, both in vacuum and in controlled gas environments (Helium and/or Oxygen) from monitoring with CCD camera and from spectroscopic studies. The expansion of the plasma plume and the growth of the nanoclusters depend strongly upon the collisions between the ablated particles and surrounding gas molecules, as well as on the chemical reactions in the case of oxygen. The spectra of the observed plasma emittion are mainly due to atomic transitions in the neutral Zn. We have also observed the photoluminescence of the nanoclusters suspended in the gas and their decomposition in the beam of ArF laser.
Create a lesson
Related papers
Critical velocity and dissipation mechanism in finite superfluid 4He nanodroplets
Keshav Sishodia, Ernesto García-Alfonso, Nadine Halberstadt et al.
Ultrafast Proton-Induced Collective Dynamics Regulated by Water-Mediated Hydrogen-Bond Networks in Liquids
Xiaokun Liu, Bozhu Chen, Yizhu Zhang et al.
Correlated detection of electrons and ions emitted from laser-induced nanoplasmas in doped helium nanodroplets in the single-shot single-cluster regime
Keshav Sishodia, Cristian Medina, Robert Moshammer et al.
Phase-dependent THz yield in two-color laser plasmas: nonlinear propagation and Coulomb-modified recollision
Yange Chen, Ahai Chen, Jiahui Guo et al.
Effect of deuteration on methane cluster stability
Ake Andersson, Klavs Hansen, Siegfried Kollotzek et al.
Multiple photoelectron inelastic scattering in large He nanodroplets
Niklas Scheel, Narcis Silviu Blaj, Rajni Rajni et al.