Introducing a small aperture in a 4D electron microscope has enabled researchers to visualize the phase transition of a single metal–organic framework particle with excellent spatio-temporal resolution. The spin-crossover dynamics of one nanoparticle are found to be distinct from those observed for an ensemble of heterogeneous nanoparticles.
- Renske M. van der Veen
- Oh-Hoon Kwon
- Ahmed H. Zewail
