Selective adsorption and patterning of Si nanoparticles fabricated by laser ablation on functionalized self-assembled monolayer

We demonstrate an in situ selective adsorption of Si nanoparticles fabricat ed by laser ablation on a functionalized self-assembled monolayer (SAM). Si nanoparticles adsorbed on -CH3 terminated a SAM while Si particles did not adsorb on -NH2, -F, -OH, and -COOH, terminated SAMs. The end group of a SA M solely determines the selectivity against Si nanoparticle adsorption. We utilized the screening ability of functionalized SAMs to pattern Si nanopar ticles onto desired locations on a Si substrate. (C) 2001 American Institut e of Physics.