*International Meetings

*Publications

2023

• "Methanol Formation through Reaction of Low-energy CH₃⁺ Ions with an Amorphous Solid Water Surface at Low Temperature"
  Y. Nakai, W. M. C. Sameera, K. Furuya, H. Hidaka, A. Ishibashi, N. Watanabe
  Astrophys. J. 953, 162 (2023)
  
  
• "Observation of hydrogen-ordered cubic ice thin films on the surface of ice Ic nanocrystals upon coarsening"
  A. Kouchi, T. Yamazaki, H. Katsuno, H. Nada, T. Hama, Y. Kimura
  Chemical Physics 572 (2023) 111966
  
  
• "Radical reactions on interstellar icy dust grains: Experimental investigations of elementary processes"
  M. Tsuge, N. Watanabe
  Proc. Jpn. Acad., Ser. B99 (2023)
  
  
• "Surface Reaction of Methyl Mercaptan (CH₃SH) with Hydrogen Atoms on Amorphous Solid Water"
  T. Nguyen, Y. Oba, W. M. C. Sameera, K. Furuya, A. Kouchi, N. Watanabe
  Astrophys. J. 944, 219(14pp) (2023)
  
  
• "Nucleation experiments on a titanium?carbon system imply nonclassical formation of presolar grain"
  Y. Kimura, K. K. Tanaka, Y. Inatomi, C. Aktas, J. Blum
  Science Advances 9, eadd8295 (2023)
  
  
• "Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples"
  T. Nakamura, et al.,
  Science, 379, eabn8671 (2023)
  
  

2022

• "Direct Determination of the Activation Energy for Diffusion of OH Radicals on Water Ice"
  A. Miyazaki, M. Tsuge, H. Hidaka, N. Nakai, N. Watanabe
  Astrophys. J. Lett. 940, L2 (2022)
  
  
• "Penetration of Nonenergetic Hydrogen Atoms into Amorphous Solid Water and their Reaction with Embedded Benzene and Naphthalene"
  M. Tsuge, A. Kouchi, N. Watanabe
  Astrophys. J. 933, 138(9pp) (2022)
  
  
• "Diffusion Activation Energy and Desorption Activation Energy for Astrochemically Relevant Species on Water Ice show No Clear Relation"
  K. Furuya, T. Hama, Y. Oba, A. Kouchi, N. Watanabe, Y. Aikawa
  Astrophys. J. Lett. 933, L16 (2022)
  
  
• "Hydrogen abstraction reactions in formic and thioformic acid isomers by hydrogen and deuterium atoms"
  G. Molpeceres, I. Jiménez-Serra, Y. Oba, T. Nguyen, N. Watanabe, J. García de la Concepción, B. Maté, R. Oliveira, J. Kästner
  Astron. Astrophys. 663, A41 (2022)
  
  
• "Modelling the Radical Chemistry on Ice Surfaces: An Integrated Quantum Chemical and Experimental Approach"
  W. M. C. Sameera, B. Senevirathne, T. Nguyen, Y. Oba, A. Ishibashi, M. Tsuge, H. Hidaka, N. Watanabe
  Front. Astron. Space Sci. 9, 890161 (2022)
  
  
• "Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites"
  Y. Oba, Y. Takano, Y. Furukawa, T. Koga, D. P. Glavin, J. P. Dworkin, H. Naraoka
  Nature COmmunications 13, 2008 (2022)
  
  
• "Quantifying the chemical desorption of H₂S and PH₃ from amorphous water ice surfaces"
  K. Furuya, Y. Oba, T. Shimonishi
  Astrophys. J. 926, 171(17pp) (2022)
  
  
• "Thermal Desorption of Interstellar Ices: A Review on the Controlling Parameters and Their Implications from Snowlines to Chemical Complexity"
  M. Minissale, Y. Aikawa, E. Bergin, M. Bertin, W. A. Brown, S. Cazaux, S. B. Charnley, A. Coutens, H. M. Cuppen, V. Guzman, H. Linnartz, M. R. S. McCoustra, A.Rimola, J.G.M. Schrauwen, C. Toubin, P. Ugliengo, N. Watanabe, V. Wakelam, F. Dulieu
  ACS Earth Space Chem. 6, 597-630
  
  
• "FAUST III. Misaligned rotations of the envelope, outflow, and disks in the multiple protostellar system of VLA4 1623-2417"
  S. Ohashi et al.
  Astrophysical J. 927, 54 (22pp) (2022)
  
  
• "Rock Magnetic Characterization of Returned Samples From Asteroid (162173) Ryugu: Implications for Paleomagnetic Interpretation and Paleointensity Estimation"
  M. Sato, et al.
  Journal of Geophysical Research ? Planets 127, e2022JE007405 (2022)
  
  
• "Low-Temperature Hydrothermal Synthesis of Chromian Spinel from Fe-Cr Hydroxides Using a Flow-through Reactor"
  Y. Ohtomo, J. Yang, M. Nishikata, D. Kawamoto, Y. Kimura, T. Otake, T. Sato
  Minerals 12, 1110(15pp) (2022)
  
  
• "Inefficient Growth of SiOx Grains: Implications for Circumstellar Outflows"
  Y. Kimura, K. K. Tanaka, Y. Inatomi, F. T. Ferguson, J. A. Nuth III
  Astrophys. J. Lett. 934, L10(7pp) (2022)
  
  
• "Liquid-Cell Transmission Electron Microscopy Observation of Two-Step Collapse Dynamics of Silicon Nanopillars on Evaporation of Propan-2-ol: Implications for Semiconductor Integration Density"
  Y. Sasaki, T. Yamazaki, Y. Kimura
  ACS Applied Nano Materials 5, 9495?9502 (2022)
  
  
• "Low- and high-density unknown waters at ice?water interface"
  H. Niinomi, A. Kouch, T. Hama, H. Nada, T. Yamazaki, Y. Kimura
  The journal of Physical Chemistry Letters 13, 4251?4256 (2022)
  
  
• "Feasibility of control of particle assembly by dielectrophoresis in liquid-cell transmission electron microscopy"
  T. Yamazaki, H. Niinomi, Y. Kimura
  Microscopy 71, 231?237 (2022)
  
  
• "Formation of ice particles through nucleation in the mesosphere"
  K. K. Tanaka, Ingrid Mann, Y. Kimura
  Atmospheric Chemistry and Physics 22, 5639?5650 (2022)
  
  
• "Possible embryos and precursors of crystalline nuclei of calcium carbonate observed by liquid-cell transmission electron microscopy"
  Y. Kimura, H. Katsuno, T. Yamazaki
  Faraday Discussions 235, 81?94 (2022)
  
  
• "Early Detection of Nucleation Events from Solution in LC-TEM by Machine Learning"
  H. Katsuno, Y. Kimura, T. Yamazaki, I. Takigawa
  Frontiers in Chemistry, section Analytical Chemistry 10, 818230(9pp) (2022)
  
  
• "Fast improvement of TEM image with low-dose electrons by deep learning"
  H. Katsuno, Y. Kimura, T. Yamazaki, I. Takigawa
  Microscopy and Microanalysis 28, 138?144 (2022)
  
  

2021

• "Measurements of Ortho-to-para Nuclear Spin Conversion of H₂ on Low-temperature Carbonaceous Grain Analogs: Diamond-like Carbon and Graphite"
  M. Tsuge, A. Kouchi, N. Watanabe
  Astrophys. J. 923, 71(8pp), (2021)
  
  
• "UV-Induced Formation of Ice XI Observed Using an Ultra-High Vacuum Cryogenic Transmission Electron Microscope and its Implications for Planetary Science"
  A. Kouchi, Y. Kimura, K. Kitajima, H. Katsuno, H. Hidaka, Y. Oba, M. Tsuge, T. Yamazaki, K. Fujita, T. Hama, Y. Takahashi, S. Nakatsunbo, N. Watanabe
  Frontier in Chemistry 9, 799851, (2021)
  
  
• "Successive H-atom Addition to Solid OCS on Compact Amorphous Solid Water"
  T. Nguyen, Y. Oba, W. M. C. Sameera, A. Kouchi, N. Watanabe
  Astrophys. J. 922, 146(13pp), (2021)
  
  
• "Efficient formation pathway of methyl formate: the role of OH radicals on ice dust"
  A. Ishibashi, H. Hidaka, Y. Oba, A. Kouchi, N. Watanabe
  Astrophys. J. Lett. 921, L13(9pp), (2021)
  
  
• "Experimental and computational studies on the physico-chemical behavior of phosphine induced by reactions with H and D atoms on interstellar ice grains"
  T. Nguyen, Y. Oba, W. M. C. Sameera, A. Kouchi, N. Watanabe
  Astrophys. J. 918, 73(15pp), (2021)
  
  
• "Transmission Electron Microscopy Study of the Morphology of Ices Composed of H₂O, CO₂, and CO on Refractory Grains"
  A. Kouchi, M. Tsuge, T. Hama, Y. Oba, S. Okuzumi, S. Sirono, M. Momose, N. Nakatani, K. Furuya, T. Shimonishi, T. Yamazaki, H. Hidaka, Y. Kimura, K. Murata, K. Fujita, S. Nakatsubo, S. Tachibana, and N. Watanabe
  Astrophys. J. 918, 45, (2021)
  
  
• "Formation of chiral CO polyhedral crystals on icy interstellar grains"
  A. Kouchi, M. Tsuge, T. Hama, H. Niinomi, N. Nakatani, T. Shimonishi, Y. Oba, Y. Kimura, S. Sirono, S. Okuzumi, M. Momose, K. Furuya and N. Watanabe
  MNRAS 505, 1530.1542 (2021)
  
  
• "Binding energies and sticking coefficients of H₂ on crystalline and amorphous CO ice"
  G. Molpeceres, V. Zaverkin, N. Watanabe, J. Kästner
  Astron. Astrophys, 648, A84, (2021)
  
  
• "FAUST II. Discovery of a secondary outflow in IRAS 15398-3359: Variability in outflow direction during the earliest stage of star formation?"
  Y. Okoda et al.
  Astrophysical Journal,910, 11(13pp) (2021)
  
  
• "Rapid Ortho-to-para Nuclear Spin Conversion of H₂ on a Silicate Dust Surface"
  M. Tsuge, T. Namiyoshi, K. Furuya, T. Yamazaki, A. Kouchi, N. Watanabe
  Astrophys. J. 908, 234 (2021)
  
  
• "Behavior of Hydroxyl Radicals on Water Ice at Low Temperatures"
  M. Tsuge, N. Watanabe
  Acc. Chem. Res. 54, 471 (2021)
  
  
• "CH₃O Radical Binding on Hexagonal Water Ice and Amorphous Solid Water"
  W. M. C. Sameera, S. Bethmini, S. Andersson, M. Al-Ibadi, H. Hidaka, A. Kouchi, G. Nyman, N. Watanabe
  J. Phys. Chem. A 125, 387 (2021)
  
  
• "Delivery of Electrons by Proton-Hole Transfer in Ice at 10 K: Role of Surface OH Radicals"
  K. Kitajima, Y. Nakai, W. M. C. Sameera, M. Tsuge, A. Miyazaki, H. Hidaka, A. Kouchi, N. Watanabe
  J. Phys. Chem. Lett. 12, 704 (2021)
  
  
• "Direct observation of the moment of nucleation from a solution by TEM"
  Y. Kimura
  Microscopy 7, 13?21 (2021)
  
  
• "In-situ transmission electron microscopy of nucleation processes in liquids"
  Y. Kimura
  Microscopy (Japanese) 56, L5 (2021)
  
  
• "Electron holography details the Tagish Lake parent body and implies early planetary dynamics of the Solar System"
  Y. Kimura, K. Yamamoto, S. Wakita
  Astrophys. J. Lett. 917, L5 (2021)
  
  
• "On the nature of organic dust in novae"
  I. Endo, I. Sakon, T. Onaka, Y. Kimura, S. Kimura, S. Wada, L. A. Helton, R. M. Lau, Y. Kebukawa, Y. Muramatsu, N. O. Ogawa, N. Ohkouchi, M. Nakamura, S. Kwok
  Astrophys. J. 917, 103(10pp) (2021)
  
  
• "Radiolysis-Induced Crystallization of Sodium Chloride in Acetone by Electron Beam"
  T. Yamazaki, Y. Kimura
  Microscopy and Microanalysis, 27, 459?465 (2021)
  
  
• "In-situ water-immersion experiments on amorphous silicates in the MgO-SiO2 system: Implications for the onset of aqueous alteration in primitive meteorites"
  Y. Igami, A. Tsuchiyama, T. Yamazaki, M. Matsumoto, Y. Kimura
  Geochimica et Cosmochimica Acta, 293, 86?102 (2021)
  
  

2020

• "Extraterrestrial hexamethylenetetramine in meteorites-a precursor of prebiotic chemistry in the inner solar system"
  Y. Oba, Y. Takano, H. Naraoka, Y. Furukawa, D. P. Glavin, J. P. Dworkin, S. Tachibana Nature Communications, 11, 6243 (2020)
  
  
• "Behavior of Hydroxyl Radicals on Water Ice at Low Temperatures"
  M. Tsuge, N. Watanabe
  Acc. Chem. Res. 54, 471 (2021)
  
  
• "Photostimulated desorption of OH radicals from amorphous solid water: Evidence for the interaction of visible light with an OH-ice complex"
  A. Miyazaki, N. Watanabe, W. M. C. Sameera, Y. Nakai, M. Tsuge, T. Hama, H. Hidaka, and A. Kouchi
  Phys. Rev. A 102, 052822, (2020)
  
  
• "UV-ray irradiation never causes amorphization of crystalline CO₂: A transmission electron microscopy study"
  Masashi Tsuge, Thanh Nguyen, Yasuhiro Ob, Tetsuya Hama, Akira Kouchi, Naoki Watanabe
  Chem. Phys. Lett. 760, 137999 (2020)
  
  
• "FAUST I. The hot corino at the heart of the prototypical Class I protostar L1551 IRS5"
  E. Bianchi et al.
  Mon. Not. R. Astron. Soc. 498, L87 (2020)
  
  
• "Quantitative Anisotropic Analysis of Molecular Orientation in Amorphous N₂O at 6 K by Infrared Multiple-Angle Incidence Resolution Spectrometry"
  T. Hama, A. Ishibashi, A. Kouchi, N. Watanabe, N. Shioya, T. Shimoaka, T. Hasegawa
  J. Phys. Chem. Lett. 11, 7857 (2020)
  
  
• "Diffusive hydrogenation reactions of CO embedded in amorphous solid water at elevated temperatures ~70 K"
  Masashi Tsuge, Hiroshi Hidaka, Akira Kouchi, Naoki Watanabe
  Astrophys. J. 900, 187(7pp) (2020)
  
  
• "In vivo characterization of the structures of films of a fatty acid and an alcohol adsorbed on the skin surface"
  T. Hama, A. Kouchi, N. Watanabe, N. Shioya, T. Shimoaka, T. Hasegawa
  Biophys. Chem. 166, 106459 (2020)
  
  
• "An Experimental Study of Chemical Desorption for Phosphine in Interstellar Ice"
  Thanh Nguyen, Yasuhiro Oba, Takashi Shimonishi, Akira Kouchi, Naoki Watanabe
  Astrophys. J. Lett. 898, L52(6pp),(2020)
  
  
• "Precometary organic matter: A hidden reservoir of water inside the snow line"
  H. Nakano, N. Hirakawa, Y. Matsubara, S. Yamashita, T. Okuchi, K. Asahina, R. Tanaka, N.i Suzuki, H. Naraoka, Y. Takano, S. Tachibana, T. Hama, Y. Oba, Y. Kimura, N. Watanabe, A. Kouchi
  Scientific Reports 10, 7755 (2020)
  
  
• "Direct Measurements of Activation Energies for Surface Diffusion of CO and CO₂ on Amorphous Solid Water Using In Situ Transmission Electron Microscopy"
  Akira Kouchi, Kenji Furuya, Tetsuya Hama, Takeshi Chiga, Takashi Kozasa, and Naoki Watanabe
  Astrophys. J. Lett. 891, L22(7pp) (2020)
  
  
• "Experimental Approach to Physicochemical Hydrogen Processes on Cosmic Ice Dust"
  N. Watanabe, M. Tsuge
  J. Phys. Soc. Jpn 89, 051015 (2020)
  
  
• "High-Density Liquid Water at a Water?Ice Interface"
  H. Niinomi, T. Yamazaki, H. Nada, T. Hama, A. Kouchi, J. Okada, J. Nozawa, S. Uda, Y. Kimura
  The Journal of Physical Chemistry Letters, 11, 6779?6784 (2020)
  
  
• "Time-Resolved Observation of Evolution of Amyloid-β Oligomer with Temporary Salt Crystals"
  K. Nakajima, T. Yamazaki, Y. Kimura, M. So, Y. Goto, H. Ogi
  The Journal of Physical Chemistry Letters 11, 6176?6184 (2020)
  
  
• "High mobility of lattice molecules and defects during the early stage of protein crystallization"
  T. Yamazaki, A. E. S. Van Driessche, Y. Kimura
  Soft Matter 16, 1955?1960 (2020)
  
  

2019

• "Ultraviolet-photon exposure stimulates negative current conductivity in amorphous ice below 50 K"
  N. Watanabe, W. M. C. Sameera, H. Hidaka, A. Miyazaki, A. Kouchi
  Chem. Phys. Lett. 737, 136820 (2019)
  
  
• "Nucleobase synthesis in interstellar ices"
  Y. Oba, Y. Takano, H. Naraoka, N. Watanabe and A. Kouchi
  Nature Communications, 10,4413 (2019)
  
  
• "H₂ Ortho.Para Spin Conversion on Inhomogeneous Grain Surfaces"
  Kenji Furuya, Yuri Aikawa, Tetsuya Hama, Naoki Watanabe
  Astrophys. J. 882, 172 (11pp) (2019)
  
  
• "Probing the Molecular Structure and Orientation of the Leaf Surface of Brassica oleracea L. by Polarization Modulation-Infrared Reflection-Absorption Spectroscopy"
  T. Hama, K. Seki, A. Ishibashi, A. Miyazaki, A. Kouchi, N. Watanabe, T. Shimoaka, T. Hasegawa
  Plant Cell Physiol 60, 1567 (2019)
  
  
• "Interactions of Atomic and Molecular Hydrogen with a Diamond-like Carbon Surface: H₂ Formation and Desorption"
  Masashi Tsuge, Tetsuya Hama, Yuki Kimura, Akira Kouch, Naoki Watanabe
  Astrophys. J. 878, 23 (10pp) (2019)
  
  
• "Physico-chemical Behavior of Hydrogen Sulfide Induced by Reactions with H and D Atoms on Different Types of Ice Surfaces at Low Temperature"
  Yasuhiro Oba, Takuto Tomaru, Akira Kouchi, and Naoki Watanabe
  Astrophys. J. 874, 124 (8pp) (2019)
  
  
• "Exposure experiments of amorphous silicates and organics to cometary ice and vapor analogues"
  Aki Takigawa, Yoshihiro Furukawa, Yuki Kimura, Bjorn Davidsson, Tomoki Nakamura
  Astrophys. J. 881, 27 (2019)
  
  
• "Theoretical Analysis of Crystallization by Homogeneous Nucleation of Water Droplets"
  Kyoko K. Tanaka, Yuki Kimura
  Physical Chemistry Chemical Physics 21, 2410-2418 (2019)