Highly intense femtosecond laser irradiation of a metallic ion solution is a potential technique to produce nanoparticles of noble metals and their alloys without any reducing agents. In addition, all-proportional solid-solution alloy nanoparticles of noble metals even with immiscible nature in a multimetallic system can be easily formed in the mixed ion solution. The method has many advantages compared to conventional chemical and/or physical methods with regard to not only the simplicity of the method itself but also the purity and the controllability of alloy composition of fabricated nanoparticles. However, the productivity of a stationary production system has been limited by the volume of a glass cuvette containing ion solution. In the present study, larger-scale production by applying a flow system of ion solution was demonstrated for improving the productivity. The influence of irradiation time and repetition rate of the femtosecond laser, and flow rate of the solution on the efficiency of nanoparticles formation was studied. The flow system showed similar results with the stationary system with respect to the mechanism for the nanoparticles formation. In addition, the pulse repetition rate was effective to increase the productivity by more than 200 % compared to the stationary system.
|Number of pages||8|
|Journal||Applied Physics A: Materials Science and Processing|
|Publication status||Published - 2015 Sep 12|
ASJC Scopus subject areas
- Materials Science(all)