Environmental Scanning Ultrafast Electron Microscopy: Structural Dynamics of Solvation at Interfaces

Authors

  • Dr. Ding-Shyue Yang,

    1. Physical Biology Center for Ultrafast Science & Technology, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, CA 91125 (USA)
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  • Dr. Omar F. Mohammed,

    1. Physical Biology Center for Ultrafast Science & Technology, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, CA 91125 (USA)
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  • Prof. Dr. Ahmed H. Zewail

    Corresponding author
    1. Physical Biology Center for Ultrafast Science & Technology, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, CA 91125 (USA)
    • Physical Biology Center for Ultrafast Science & Technology, Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, CA 91125 (USA)
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  • This work was supported by the Air Force Office of Scientific Research and the National Science Foundation in the Gordon and Betty Moore Center for physical biology at Caltech. We thank Prof. Dr. Samir K. Pal for insightful discussions during the initial phase of this work. O.F.M. is grateful for a distinguished scholar award provided by the Arab Fund for Economic and Social Development.

Abstract

original image

On the surface: CdSe surfaces have been used as a prototype for the investigation of the spatiotemporal characteristics of solvation by environmental scanning ultrafast electron microscopy (see picture, GSED=gaseous secondary electron detector). This study has shown that the ultrafast relaxation dynamics of polar molecules, such as water, in the adsorbate layers exhibit a striking dependence on the CdSe surface structure.

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