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Femtosecond-resolved imaging of a single-particle phase transition in energy-filtered ultrafast electron microscopy
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- Kim, Ye-Jin (författare)
- Ulsan Natl Inst Sci & Technol UNIST, Coll Nat Sci, Dept Chem, 50 UNIST gil, Ulsan 44919, South Korea.;Inst Basic Sci, Ctr Soft & Living Matter, 50 UNIST gil, Ulsan 44919, South Korea.;CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA.
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- Nho, Hak-Won (författare)
- Ulsan Natl Inst Sci & Technol UNIST, Coll Nat Sci, Dept Chem, 50 UNIST gil, Ulsan 44919, South Korea.;Inst Basic Sci, Ctr Soft & Living Matter, 50 UNIST gil, Ulsan 44919, South Korea.
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- Ji, Shaozheng (författare)
- KTH,Material- och nanofysik
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- Ulsan Natl Inst Sci & Technol UNIST, Coll Nat Sci, Dept Chem, 50 UNIST gil, Ulsan 44919, South Korea;Inst Basic Sci, Ctr Soft & Living Matter, 50 UNIST gil, Ulsan 44919, South Korea.;CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA. Ulsan Natl Inst Sci & Technol UNIST, Coll Nat Sci, Dept Chem, 50 UNIST gil, Ulsan 44919, South Korea.;Inst Basic Sci, Ctr Soft & Living Matter, 50 UNIST gil, Ulsan 44919, South Korea. (creator_code:org_t)
- American Association for the Advancement of Science (AAAS), 2023
- 2023
- Engelska.
- Ingår i: Science Advances. - : American Association for the Advancement of Science (AAAS). - 2375-2548. ; 9:4
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Using an energy filter in transmission electron microscopy has enabled elemental mapping at the atomic scale and improved the precision of structural determination by gating inelastic and elastic imaging electrons, respec-tively. Here, we use an energy filter in ultrafast electron microscopy to enhance the temporal resolution toward the domain of atomic motion. Visualizing transient structures with femtosecond temporal precision was achieved by selecting imaging electrons in a narrow energy distribution from dense chirped photoelectron packets with broad longitudinal momentum distributions and thus typically exhibiting picosecond durations. In this study, the heterogeneous ultrafast phase transitions of vanadium dioxide (VO2) nanoparticles, a repre-sentative strongly correlated system, were filmed and attributed to the emergence of a transient, low-symmetry metallic phase caused by different local strains. Our approach enables electron microscopy to access the time scale of elementary nuclear motion to visualize the onset of the structural dynamics of matter at the nanoscale.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- Kim, Ye-Jin
- Nho, Hak-Won
- Ji, Shaozheng
- Lee, Hyejin
- Ko, Hyunhyub
- Weissenrieder, J ...
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- Kwon, Oh-Hoon
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