Abstract
We report on the formation of hollow MgO particles by excimer laserablation of bulk Mg in water and aqueous solutions of sodium dodecylsulfate (SDS) and sodium citrate (SC). Lamellar nanostructures ofMg(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 andMg(OH)2 in water, but also cavitation bubbles. The bubble interfaces trapped the MgO nanoparticlesto decrease the surface free energy of the system, finally resulting in hollow particles.
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