US Patent 7922786 - Laser pulverized nanoparticles

http://www.freepatentsonline.com/7922786.html

This patent from Hamamatsu Photonics teaches a method to increase the efficiency of nanoparticle production via laser irradiation. Claim 1 reads:

1. A nanoparticle production method comprising:

a nanoparticle production step of producing nanoparticles by irradiating a laser light irradiation portion of a to-be-treated liquid with a laser light, wherein suspended particles are suspended, to pulverize the suspended particles in the laser light irradiation portion; and

wherein the laser light irradiation portion of the to-be-treated liquid is cooled prior to irradiation of the laser light irradiation portion with the laser light.