819403.fig.003a
(a)
819403.fig.003b
(b)
819403.fig.003c
(c)
819403.fig.003d
(d)
Figure 3: FE-SEM images of (a) aluminum powder, and Al2O3 nanoparticles at different laser energies of (b) 1 J, (c) 3 J, and (d) 5 J.