| abstract |
With this invention, in a nanoparticle production method, wherein nanoparticles are produced by irradiating a laser light irradiation portion 2 a of a to-be-treated liquid 8 with a laser light, in which suspended particles are suspended, to pulverize the suspended particles in laser light irradiation portion 2 a , laser light irradiation portion 2 a of to-be-treated liquid 8 is cooled. In this case, by the cooling of to-be-treated liquid 8 , the respective suspended particles are cooled in their entireties. When the portion 2 a of this to-be-treated liquid 8 is irradiated with the laser light, the laser light is absorbed at the surfaces of the suspended particles at portion 2 a . Since to-be-treated liquid 8 is cooled during this process, significant temperature differences arise between the interiors and surfaces of the suspended particles and between the surfaces of the suspended particles and the to-be-treated liquid at laser light irradiation portion 2 a , and highly efficient nanoparticulation is realized. |