Superfluid Helium Droplets Superfluid helium nanodroplets enable ultra-clean fabrication of metallic clusters and nanowires that are difficult to access by other routes. In their Review (10.1002/sstr.202500586), Daniel Knez and co-workers highlight aberration-corrected STEM, EELS/EDX, and electron tomography for resolving structure, composition, and 3D morphology. In situ heating reveals nanoscale thermodynamics, including Rayleigh breakup, alloying, and structural inversion. They also discuss beam-induced transformations and their simulation and outline open questions to motivate further research.
Knez et al. (Sun,) studied this question.