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Hydrated Molecular Dynamics Research Team
Toshinori SUZUKI
Team Head
Toshinori SUZUKI (D.Sci.)
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Research Areas

The hydration dynamics research team aims at elucidation of the electronic structure and dynamics of pure water and hydrated molecules in aqueous solution by time-resolved photoelectron spectroscopy (TRPES). In 1998, we pioneered time-resolved photoelectron imaging (TRPEI) of isolated molecules and started making snap-shot of non-stationary electronic states to understand the driving force of chemical dynamics. Since then, we have also been working on liquid atomization methods as a means to introduce liquids into vacuum for TRPES. We have also investigated another method of producing a liquid beam, a laminar flow of liquid, to introduce bulk solution into a photoelectron spectrometer. We succeeded in TRPES of liquid beams in 2008. On the basis of our experience and expertise, spanning more than a decade, of TRPEI of isolated molecules, we plan to compare the electronic dynamics in bare molecules and in hydrated molecules in aqueous solution.

Research Subject

  1. SoftX-ray Photoelectron spectroscopy of laminar flow of liquids
  2. Time-resolved photoelectron spectroscopy of laminar flow of liquids
  3. Fourier transform infrared spectroscopy of liquid droplets

List of Selected Publications

  1. Tang, Y., Shen, H., Sekiguchi, K., Kurahashi, N., Nishizawa, K., Zuo, P., Suzuki, Y., and Suzuki, T.:
    "Time-resolved photoelectron spectroscopy of ultrafast electronic dynamics in aqueous solution."
    Journal of Physical Chemistry Letters, submitted (2010).
  2. Tang, Y., Shen, H., Sekigchi, K., Kurahashi, N., and Suzuki, T.:
    "Direct measurement of vertical detachment energy of hydrated electron."
    Physical Chemistry Chemical Physics, submitted (2010).
  3. Liu, S. Y. et al.:
    "Time-resolved photoelectron imaging using a femtosecond UV laser and a VUV free-electron laser."
    Physical Review A, in press (2010).
  4. Matsuoka. H., Sekiguchi, S., Nishizawa, K., and Suzuki, T.:
    "Mid-infrared extinction spectra of sub-micron carbohydrate particles generated by pneumatic atomizer."
    Journal of Physical Chemistry A, 113, 4686 (2009).
  5. Matsuoka, H., Sekiguchi, S., Yagi, N., Inoue, K., Ohta, N., and Suzuki, T.:
    "Pneumatic atomization of liquid water and characterization of submicron-sized droplets by Fourier transform infrared spectroscopy."
    Journal of Physical Chemistry C, 113, 14110 (2009).
  6. Ogi, Y., Kohguchi, H., Niu, D., Ohshimo, K., and Suzuki, T.:
    "Super-resolution photoelectron imaging with real-time subpixelation by field programmable gate array and its application to NO and benzene photoionization."
    Journal of Physicsl Chemistry A, 113, 14536 (2009).
  7. Horio, T., Fuji, T., Suzuki, Y., and Suzuki, T.:
    "Probing ultrafast internal conversion through conical intersection via time-energy map of photoelectron angular anisotropy."
    Journal of the American Chemical Society, 131, 10392-10393 (2009).
  8. Horio, T. and Suzuki, T.:
    "Multihit two-dimensional charged particle imaging system with real-time image processing at 1000 frame/sec."
    Review of Scientific Instrument, 80, 013706 (2009).
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