Figure 4.

Nanodot array fabrication. a A monolayer of spheres deposited on a thin alumina film is illuminated with a single laser pulse. b Near-field enhancement underneath the spheres leads to the parallel nanodrilling of the film. c A metal (gold in our case) is then deposited and the alumina membrane is dissolved in basic solution. d An ordered Au nanodot array is then obtained on the silicon substrate

Kabashin et al. Nanoscale Research Letters 2010 5:454-463   doi:10.1007/s11671-010-9543-z