title: Fabrication and formation mechanism of hollow MgO particles by pulsed excimer laser ablation of Mg in liquid.
abstract: We report on the formation of hollow MgO particles by excimer laser ablation of bulk Mg in water and aqueous solutions of sodium dodecyl sulfate (SDS) and sodium citrate (SC). Lamellar nanostructures of Mg(OH)(2) also formed in water, but the formation could be avoided by the addition of SDS or SC. Laser ablation produced not only Mg species that were oxidized into MgO and Mg(OH)(2) in water, but also cavitation bubbles. The bubble interfaces trapped the MgO nanoparticles to decrease the surface free energy of the system, finally resulting in hollow particles.
authors.affiliation: Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
authors.forename: Zijie
authors.initials: Z
authors.lastname: Yan
authors.forename: Ruqiang
authors.initials: R
authors.lastname: Bao
authors.forename: Carl M
authors.initials: CM
authors.lastname: Busta
authors.forename: Douglas B
authors.initials: DB
authors.lastname: Chrisey