Holmes, S. et al. (2022) Megahertz pulse trains enable multi-hit serial femtosecond crystallography at X-ray free electron lasers Nature Commun. 13, 4708 

Here, we exploit the MHz pulse structure ofthe European XFEL to obtain two complete datasets from the same lysozyme crystal, first hit and the second hit, before it exits the beam. Comparisons between the two structures reveal no indications of radiation damage or significant changes within the active site. This technique, multi-hit SFX, can be used as a tool for tracking sub-microsecond structural changes in individual single crystals.

Cruz-Mazo, F. & Stone, H. A. (2022) Pinch-off of liquid jets at the finite scale of an interface. Phys. Rev. Fluids 7, L012201

This work studies for the first time how a fluid-fluid interface cannot be considered infinitely narrow within fluid fragmentation. In particular, a new set of self-similar equations is obtained and resolved for the jet pinching-off as the finite-thickness of the interface becomes in the characteristic radial size.

Cruz-Mazo, F. et al. (2019) Aerodynamically stabilized Taylor cone jets. Phys. Rev. E 100 (3), 031101 (Rapid Communications)

We introduce a way to stabilize steady micro/nanoliquid jets from Taylor cones and co-flowing gas streams. We theoretically study this configuration's dripping-jetting transition through a global stability analysis as a function of the governing parameters involved. A balance between the local radial acceleration to the surface tension stressgradient, the mass conservation, and the energy balance equations enable us to derive two coupled scaling laws that predict both the minimum jet diameter and its maximum velocity.