Features of optical breakdown of aqueous colloidal solutions of ferric oxide (Fe2O3) nanoparticles occurring on individual or on two closely located nanoparticles

A streak camera was used to study the dynamics of the development of plasma flashes of the optical breakdown that occurs in aqueous solutions of Fe2O3 nanoparticles. It is shown that optical breakdown can occur according to two scenarios - initiated on single nanoparticle (78%) or on two closely located nanoparticles (22%). When optical breakdown occurs on two nanoparticles, cavitation bubbles move away from each other on 50 mu m with velocity of 3000 m/s under the action of shock waves initiated by the optical breakdown on neighboring particles. The estimated pressure at the shock wave front is approximately 2300 MPa.

Automated summary

The dynamics of plasma flashes during optical breakdown in aqueous solutions of Fe2O3 nanoparticles were studied using a streak camera. It was found that optical breakdown can occur in two scenarios - on a single nanoparticle or on two closely located nanoparticles. When optical breakdown occurs on two nanoparticles, cavitation bubbles move away from each other with a velocity of 3000 m/s over a distance of 50 μm under the action of shock waves. The estimated pressure at the shock wave front is around 2300 MPa.