Kyushu University Academic Staff Educational and Research Activities Database
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KENJI FURUYA Last modified date:2023.11.28

Professor / Molecular Science, Science and Engineering of Materials and Devices, Interdisciplinary Graduate School of engineering Sciences
Division for Experimental Natural Science
Faculty of Arts and Science

Graduate School

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 Reseacher Profiling Tool Kyushu University Pure
Academic Degree
Dr. Science
Country of degree conferring institution (Overseas)
Field of Specialization
Molecular Spectroscopy, Chemical Reaction Dynamics, Plasma Chemistry
ORCID(Open Researcher and Contributor ID)
Total Priod of education and research career in the foreign country
Outline Activities
We are originally developing an equipment for observing Coulomb crystal and liquid in a DC glow discharge. Using this equipment, the following phenomena have newly been observed. (i) The levitated microparticles are clearly separated in a few layers (or phases): the lower layer is crystal-like and sparse, the middle layer is relatively dense and the included particles are slowly moving, and the upper layer consists of very fast-moving microparticles. (ii) There are three trap areas in this equipment. The flow of microparticles between the center and side areas has been observed. It is possible to control the flow direction by suitably adjusting the applied voltage to the electrodes. In addition, we are going with molecular dynamics calculations to reproducing the experimental results.

I am in charge of a few class of KIKAN education for undergraduate students, and developing news classes for active learning.
I am in charge of coordinating lectures about career development.
I am in charge of a few class for graduate students.

[Social activities]
Vice-chairman of the 12th Annual Meeting of Japan Society of Molecular Science
Chairman of the Symposium for Reaction Path Search 2018
Research Interests
  • Dynamics and properties of Coulomb crystals in plasmas
    keyword : plasma, crystal
    2017.02Studies on the reaction dynamics in reactive plasmas.
  • Chemical reaction in reactive plasmas
    keyword : plasma, chemical reaction dynamics
    2002.04Studies on the reaction dynamics in reactive plasmas.
  • Experimental and Quantum chemistry study on Ion-molecule reactions
    keyword : chemical reaction, collision, dynamics, quantum chemistry, molecular dynamics
    2008.04Synthesis of nanoparticles in slutions using gas-liquid ingerface discharge.
  • Dissociation mechanisms of highly excited neutral molecules and positive ions
    keyword : chemical reaction dynamics
    1990.04Studies on the dissociation dynamics of electronically highly excited molecules and positive ions prepared by electron- and photon-impact on the basis of the optical emission, mass analysis and translation energy measurements.
Academic Activities
1. Kohei Oda, Takuro Tsutsumi, Srihari Keshavamurthy, Kenji Furuya, P. B. Armentrout, and Tetsuya Taketsugu, Dynamically Hidden Reaction Paths in the Reaction of CF3+ + CO, ACS Phys. Chem. Au,, 2022.05, Reaction paths on a potential energy surface are widely used in quantum chemical studies of chemical reactions. The recently developed global reaction route mapping (GRRM) strategy automatically constructs a reaction route map, which provides a complete picture of the reaction. Here, we thoroughly investigate the correspondence between the reaction route map and the actual chemical reaction dynamics for the CF3+ + CO reaction studied by guided ion beam tandem mass spectrometry (GIBMS). In our experiments, FCO+, CF2+, and CF+ product ions were observed, whereas if the collision partner is N2, only CF2+ is observed. Interestingly, for reaction with CO, GRRM predicted reaction paths leading to the CF+ + F2CO product channel are found at a barrier height of about 2.5 eV, whereas the experimentally obtained threshold for CF+ formation was 7.48 +- 0.15 eV. In other words, the ion was not obviously observed in the GIBMS experiment even unless a much higher collision energy than the requisite energy threshold was given. On-the-fly molecular dynamics simulations revealed a mechanism that hides these reaction paths, in which a non-statistical energy distribution at the first collisionally reached transition state prevents the reaction from proceeding along some reaction paths. Our results highlight the existence of dynamically hidden reaction paths that may be inaccessible in experiments at specific energies and hence the importance of reaction dynamics in controlling the destinations of chemical reactions..
2. Kenji Furuya, Akihiro Ide, Akira Harata, Mass spectrometric investigation of high-mass neutral species in the downstream region of Ar/CH4 plasmas, Journal of Applied Physics, 10.1063/1.3605543, 110, 1, 013304, 2011.07, Mass analysis was carried out on neutral species in the downstream region of Ar/CH4 plasmas. The ionization of the neutral species by Li+ attachment, which can inhibit the fragmentation accompanied by ionization in most cases, successfully led to the observation of high-mass neutral hydrocarbons containing up to twenty-seven carbon atoms. Pure Ar and Ar/H2 plasmas were also used to investigate the influence of sputtering of an amorphous hydrocarbon (a-C:H) film deposited during the generation of the Ar/CH4 plasmas. In addition, time dependence of intensity in several neutral species accompanied by the growth of the a-C:H film and its CH4 partial pressure dependence were observed for the first time. On the basis of the present experimental results, the desorption of high-mass neutral molecules from the film to the gas phase is concluded..
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