ArticleNature communications2019
Nanosecond electron pulses in the analytical electron microscopy of a fast irreversible chemical reaction.
Article in Nature communications, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Statistically elucidated responses from low-signal contrast mechanisms in ultrafast electron microscopy.Structural dynamics (Melville, N.Y.) · 2025Article
- Time-resolved transmission electron microscopy for nanoscale chemical dynamics.Nature reviews. Chemistry · 2023Review
- Characterization of a time-resolved electron microscope with a Schottky field emission gun.Structural dynamics (Melville, N.Y.) · 2020Article
- Transient lensing from a photoemitted electron gas imaged by ultrafast electron microscopy.Nature communications · 2020Article
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We show how the kinetics of a fast and irreversible chemical reaction in a nanocrystalline material at high temperature can be studied using nanosecond electron pulses in an electron microscope. Infrared laser pulses first heat a nanocrystalline oxide layer on a carbon film, then single nanosecond electron pulses allow imaging, electron diffraction and electron energy-loss spectroscopy. This enables us to study the evolution of the morphology, crystallography, and elemental composition of the system with nanosecond resolution. Here, NiO nanocrystals are reduced to elemental nickel within 5 µs after the laser pulse. At high temperatures induced by laser heating, reduction results first in a liquid nickel phase that crystallizes on microsecond timescales. We show that the reaction kinetics in the reduction of nanocrystalline NiO differ from those in bulk materials. The observation of liquid nickel as a transition phase explains why the reaction is first order and occurs at high rates.
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Registered trials
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