Figure 3.
Visualization of nano-bubbles in warm tap water and hydrogen-water made via electrolysis.
Note: Tap water before electrolysis has only few nano-bubbles (upper-left), whereas after 60 minutes electrolysis, hydrogen nano-bubbles emerge continuously and become detectable (other three pictures) due to the laser beam-induced halation under a microscope/video camera. Scale bar: 1 μm.