抄録
We briefly review femtosecond laser induced chemical reactions and nanomaterial productions in a
liquid phase. Focused intense femtosecond laser pulses create a high density of reactive species such as
solvated electrons and cation radicals of the solvent. The solvated electrons efficiently reduce the metal
ions followed by their nanoparticle formations. Multimetallic nanoparticles, which are expected to be
utilized as electromagnetic materials and catalysts, are produced. In the cases of neat organic solvents,
polyynes and carbon nanoparticles are formed. We also presented the production of heteroatom-doped
carbon nanoparticles, which are candidates of oxygen reduction catalysts in fuel cells. By using aqueous
organic solutions and/or water/organic bilayer solutions, hydrophilic carbon nanoparticles are formed by
the successive oxidation of organic molecules by hydroxyl radicals. Nanoparticle synthesis by reactive
species in the liquid phase might be an alternative means of widely used laser ablation in liquid.
