The role of target warming in the synthesis of silicon nanoparticles by picosecond laser ablation in liquid

D.M. Popovic, A.A. Zekic, M. Trtica, J. Stasic
University of Belgrade-Faculty of Physics, RS

Keywords: silicon nanoparticles, laser ablation in liquid, picosecond laser


In our previous work, we investigated the LAL process of producing Si NPs with pulsed infrared transverse excited atmospheric (TEA) CO2 laser and we analyzed the role of thermal effects on the NP’s size distribution. In experiments that followed, we investigated the LAL process of producing Si NPs with 1064-nm Nd:YAG laser; the target surface was additionally heated during the experiment by applying the continuous laser. In the work presented here we further investigated the role of thermal effects, such as warming of the target, on the LAL process. To achieve this goal, the silicon single crystal targets that differ in volume were used. The thickness of all used targets (square shape single crystal silicon plate) was the same, while the sizes of their surfaces were 0,25cm2 and 1,96cm2. The picosecond pulse duration laser both with continuous green laser was used during the LAL experiment. The noticeable shift of NPs size distribution caused by using the targets of different volumes was reported in this work. An analysis of correlation between volume of the targets and the NPs size distribution could additionally enlighten the role of thermal effects in the LAL process.