We have performed million-atom reactive molecular dynamics simulations to study shock-induced bubble collapse near an amorphous silica surface. We observe the formation of water jet during the bubble collapse, which collides on to the silica surface causing a hemispherical pit. Fragment analysis reveals substantial ionization activities in water followed by rapid increase in H 3O + population during the pit formation. We have identified a shock-induced H 3O + ion formation mechanism, in which transient five-coordinated silicon atoms play a pivotal role.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)