Nanoparticle-Mediated Cavitation via CO₂ Laser Impacting on Water: Concentration Effect, Temperature Visualization, and Core-Shell Structures.

ABSTRACT: By taking advantage of seeded polymer nanoparticles and strong photo energy absorption, we report CO₂ laser impacting on water to produce cavitation at the air/water interface. Using a high-speed camera, three regimes (no cavitation, cavitation, and pseudo-cavitation) are identified within a broad range of nanoparticles concentration and size. The underlying correlation among cavitation, nanoparticles and temperature is revealed by the direct observation of spatiotemporal evolution of temperature using a thermal cameral. These findings indicate that nanoparticles not only act as preexisted nuclei to promote nucleation for cavitation, but also likely affect temperature to change the nucleation rate as well. Moreover, by exploiting a compound hexane/water interface, a novel core-s

SUBMITTER: Hu M 

PROVIDER: S-EPMC6892820 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature