Tapping Nanoparticles: Continuous Laser Synthesis in Liquid Flow
Channel: nanofunction
Date: 2015-12-28

"Naked" nanoparticles for catalysis application require high purity and robust manufacturing techniques. Here, fresh water is fed into the  flow chamber where gold nanoparticles are gerenated by laser ablation of a solid piece of gold, being continuously dispersed into water. The resulting purest colloid is tapped and fed by a pump to the collecting vessel where colloid concentration is quickly inceasing because flow is circulated. Of course, single path flow is possible as well, and even more simple. 
Laser power is around 50 W with nanosecond pulse duration and kHz pulse repetition rate. This set-up yields 0.3 to about 1 gram per hour, depending of the ablated solid. 
---- The video was created by Sebastian Kohsakowski within a project been supported by the Federal Ministry of Education (BMBF-NNOKAT), see
https://www.uni-due.de/barcikowski