Safety Concerns with the various ways of making Colloidal Nanoparticles!

The three ways I make nanoparticles (LVDC, HVAC Plasma Arc, Lasers) and the safety concerns. Is any way better than another? Dangers of using Plasma arc and Lasers. The best way forward for beginners. Possibility of using Etching Lasers for a safer way to make nanoparticles with lasers.

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