Fabrication and characterization of aluminum nanostructures and nanoparticles obtained using femtosecond ablation technique

► We generated well dispersed Al nanoparticles with less oxide cladding through fs laser ablation. ► We observed micro- and nano-structure formation on the substrate with different focusing conditions. ► We could explain effect of polarity of the liquid medium on the size of nanoparticles formed. ► Nonlinear optical properties of the colloidal solutions of nanoparticles were carried out.