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4D imaging of transient structures and morphologies in ultrafast electron microscopy

Barwick, Brett and Park, Hyun Soon and Kwon, Oh-Hoon and Baskin, J. Spencer and Zewail, Ahmed H. (2008) 4D imaging of transient structures and morphologies in ultrafast electron microscopy. Science, 322 (5905). pp. 1227-1231. ISSN 0036-8075. doi:10.1126/science.1164000.

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With advances in spatial resolution reaching the atomic scale, two-dimensional (2D) and 3D imaging in electron microscopy has become an essential methodology in various fields of study. Here, we report 4D imaging, with in situ spatiotemporal resolutions, in ultrafast electron microscopy (UEM). The ability to capture selected-area-image dynamics with pixel resolution and to control the time separation between pulses for temporal cooling of the specimen made possible studies of fleeting structures and morphologies. We demonstrate the potential for applications with two examples, gold and graphite. For gold, after thermally induced stress, we determined the atomic structural expansion, the nonthermal lattice temperature, and the ultrafast transients of warping/bulging. In contrast, in graphite, striking coherent transients of the structure were observed in both image and diffraction, directly measuring, on the nanoscale, the longitudinal resonance period governed by Young's elastic modulus. The success of these studies demonstrates the promise of UEM in real-space imaging of dynamics.

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Kwon, Oh-Hoon0000-0001-7114-8617
Additional Information:© 2008 American Association for the Advancement of Science. 30 July 2008; accepted 22 October 2008. We thank F. Carbone for his handling of the graphite film and for helpful discussion. This work was supported by the National Science Foundation and Air Force Office of Scientific Research in the Gordon and Betty Moore Center for Physical Biology at Caltech. Research on biological UEM imaging was supported by the National Institutes of Health. Caltech has filed a provisional patent application for the microscope described here.
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Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Issue or Number:5905
Record Number:CaltechAUTHORS:20090527-082503918
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Official Citation:4D Imaging of Transient Structures and Morphologies in Ultrafast Electron Microscopy BY BRETT BARWICK, HYUN SOON PARK, OH-HOON KWON, J. SPENCER BASKIN, AHMED H. ZEWAIL Science 21 Nov 2008: Vol. 322, Issue 5905, pp. 1227-1231 DOI: 10.1126/science.1164000
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14312
Deposited By: Tony Diaz
Deposited On:14 Aug 2009 15:26
Last Modified:08 Nov 2021 23:10

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