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Kwon, Oh Hoon
Ultrafast Laser Spectroscopy and Nano-microscopy (ULSaN Lab)
Research Interests
  • Femtochemistry/biology, 4D electron microscopy, structural dynamics, materials phenomena

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Nonchaotic Nonlinear Motion Visualized in Complex Nanostructures by Stereographic 4D Electron Microscopy

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dc.contributor.author Kwon, Oh Hoon ko
dc.contributor.author Park, Hyun Soon ko
dc.contributor.author Baskin, J. Spencer ko
dc.contributor.author Zewail, Ahmed H. ko
dc.date.available 2014-11-14T00:18:15Z -
dc.date.created 2014-11-12 ko
dc.date.issued 2010-08 ko
dc.identifier.citation NANO LETTERS, v.10, no.8, pp.3190 - 3198 ko
dc.identifier.issn 1530-6984 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/8731 -
dc.description.abstract Direct electron imaging with sufficient time resolution is a powerful tool for visualizing the three-dimensional (3D) mechanical motion and resolving the four-dimensional (4D) trajectories of many different components of a nanomachine, e.g., a NEMS device. Here, we report a nanoscale nonchaotic motion of a nano- and microstructured NiTi shape memory alloy in 4D electron microscopy. A huge amplitude oscillatory mechanical motion following laser heating is observed repetitively, likened to a 3D motion of a conductor's baton. By time-resolved 4D stereographic reconstruction of the motion, prominent vibrational frequencies (3.0, 3.8, 6.8, and 14.5 MHz) are fully characterized, showing evidence of nonlinear behavior. Moreover, it is found that a stress (fluence)-strain (displacement) profile shows nonlinear elasticity. The observed resonances of the nanostructure are reminiscent of classical molecular quasi-periodic behavior, but here both the amplitude and frequency of the motion are visualized using ultrafast electron microscopy. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Nonchaotic Nonlinear Motion Visualized in Complex Nanostructures by Stereographic 4D Electron Microscopy ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-77955564702 ko
dc.identifier.wosid 000280728900077 ko
dc.type.rims ART ko
dc.description.wostc 4 *
dc.description.scopustc 5 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-11-12 *
dc.identifier.doi 10.1021/nl102141t ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77955564702 ko
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