Journal
NATURE CHEMISTRY
Volume 5, Issue 5, Pages 395-402Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nchem.1622
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Funding
- National Science Foundation
- Swiss National Science Foundation
- Air Force Office of Scientific Research in the Gordon and Betty Moore Center for Physical Biology at the California Institute of Technology
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [964886] Funding Source: National Science Foundation
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The advancement of techniques that can probe the behaviour of individual nanoscopic objects is of paramount importance in various disciplines, including photonics and electronics. As it provides images with a spatiotemporal resolution, four-dimensional electron microscopy, in principle, should enable the visualization of single-nanoparticle structural dynamics in real and reciprocal space. Here, we demonstrate the selectivity and sensitivity of the technique by visualizing the spin crossover dynamics of single, isolated metal-organic framework nanocrystals. By introducing a small aperture in the microscope, it was possible to follow the phase transition and the associated structural dynamics within a single particle. Its behaviour was observed to be distinct from that imaged by averaging over ensembles of heterogeneous nanoparticles. The approach reported here has potential applications in other nanosystems and those that undergo (bio) chemical transformations.
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