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Published October 27, 2011 | public
Journal Article

Structural dynamics of nanoscale gold by ultrafast electron crystallography


By employing ultrafast electron crystallography in a transmission geometry for ultra-thin (2–3 nm) gold, here we show that structural dynamics of the transverse atomic motions and the atomic displacements around the equilibrium position can be separated from the measured change in Bragg diffraction, the positions and intensities of the peaks, respectively. The rate of intensity change provides the electron-lattice equilibration time whereas the observed lattice expansion, which occurs on a slower time scale, maps the delayed response of transverse lattice strain. These textbook-type results provide the microscopic stress–strain profile that is critical for understanding dynamical deformations and the effect of morphological structures at surfaces.

Additional Information

© 2011 Elsevier B.V. Received 24 August 2011; Accepted 16 September 2011. Available online 20 September 2011. This work was supported by the National Science Foundation and the Air Force Office of Scientific Research in the Center for Physical Biology at Caltech supported by the Gordon and Betty Moore Foundation. One of the authors (S.S.) gratefully acknowledges a scholarship from the Alexander von Humboldt-Foundation.

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August 19, 2023
October 24, 2023