You need to narrow your question down, considerably. What nanoparticles, of which dimensions? What type of lasers, specifically what output spectrum and what hertz? What is the overall experiment/production process you are attempting?
A quick google search brings up this article, which may be of some interest: http://www.sciencedirect.com/science/article/pii/S0030399210002100
The different between continuous laser and pulsed laser deposition is mainly for surface morphology and thickness, then the optical and electrical properties is can been changed.
Thats a nice question.Actually i'm also searching for this.Generally,we can use pulsed lasers to reduse and increase the size of nano particles by varying the fluence(gold nano we can use Nd-YAG Q switched nano pulsed Laser) by focusing the laser into the nanoparticle colloid --- : Laser ablation method .We can use other pulsed lasers also.