合体した固液界面ナノバブルの安定性

抄録

Since the existence of nanobubbles at solid-liquid interface was first suggested, many studies have reported the success of observing nanobubbles. However, the surprisingly stability mechanism is still unclear. In this work, we investigated surface nanobubbles at a pure water-highly ordered pyrolytic graphite interface by peak force tapping mode. To explain the stability, we introduced “pinning force,” which acts as a force per unit length on three-phase contact line and estimated it quantitatively. The metastability of coalesced nanobubbles was explained in terms of differences of the pinning force between the semispherical parts and the joint part.