Refereed Journals

2023

• "Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium"
  S. S. Zeichner, et al.,
  Science, 382, 1411-1416 (2023)
  
  
• "Dissolution enables dolomite crystal growth near ambient conditions"
  J. Kim, Y. Kimura, B. Puchala, T. Yamazaki, U. Becker, W. Sun, et al.,
  Science, 382, 915-920 (2023)
  
  
• "In Situ Transmission Electron Microscopy Study of Bubble Behavior Near the Surface of Ice Crystals by Using a Liquid Cell with a Peltier-Cooling Holder"
  T. Yamazaki, Y. Yashima, H. Katsuno, H. Miyazaki, T. Gondo, Y. Kimura
  Microscopy and Microanalysis, 28, 1940・949 (2023)
  
  
• "Anisotropy in Spinodal-like Dynamics of Unknown Water at Ice V-Water Interface"
  H. Niinomi, T. Yamazaki, H. Nada, T. Hama, A. Kouchi, T. Oshikiri, M. Nakagawa, Y. Kimura
  Scientific Reports, 13, 16227 (2023)
  
  
• "Visualization of nanoscale magnetic domain states in the asteroid Ryugu"
  Y. Kimura, et al.,
  Scientific Reports 13, 14096 (2023)
  
  
• "Modelling deuterated isotopologues of methanol towards the pre-stellar core L1544"
  W. Riedel, O. Sipilä, E. Redaelli, P. Caselli, A. I. Vasyunin, F. Duliu, N. Watanabe
  Astron. Astrophys. 680, A87 (2023)
  
  
• "Surface diffusion of carbon atoms as a driver of interstellar organic chemistry"
  M. Tsuge, G. Molpeceres, Y. Aikawa, N. Watanabe
  Nature Astronomy 7, 1351 (2023)
  
  
• "A systematic mechanistic survey on the reactions between OH radical and CH₃OH on ice"
  W. M. C. Sameera, Avo P. Jayaweera, Atsuki Ishibashi, Hiroshi Hidaka, Yasuhiro Oba, Naoki Watanabe
  Faraday Discussion 245, 508 (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. Kastner
  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)
  
  
• "液中における核生成過程の透過型電子顕微鏡その場観察"
  木村勇気
  顕微鏡 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)
  
  
• "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, 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)
  
  
  2018
  
  • "Measurements of the Activation Energies for Atomic Hydrogen Diffusion on Pure Solid C0"
    Y. Kimura, M. Tsuge, V. Pirronello, A. Kouchi, N. Watanabe
    Astrophys. J. Lett. 858, L23 (2018)
    
    
  • "The Ortho-to-para Ratio of Water Molecules Desorbed from Ice Made from Para-water Monomers at 11K"
    T. Hama, A. Kouchi, N. Watanabe
    Astrophys. J. Lett. 857, L13 (2018)
    
    
  • "An infrared measurement of chemical desorption from interstellar ice analogues"
    Y. Oba, T. Tomaru, T. Lamberts, A. Kouchi, N. Watanabe,
    Nature Astronomy, 2, 228-232 (2018)
    
    
  2017
  
  • "Deuterium Fractionation upon the Formation of Hexamethylenetetramines through Photochemical Reactions of Interstellar Ice Analogs Containing Deuterated Methanol Isotopologues"
    Y. Oba, Y. Takano, H. Naraoka, A. Kouchi, N. Watanabe,
    Astrophys. J. Lett. 849, 122 (2017)
    
    
  • "H₂ formation on interstellar dust grains: The viewpoints of theory, experiments, models and observations"
    V. Wakelam, E. Bron, S. Cazaux, F. Dulieu, C. Gry, P. Guillard, E. Habart, L. Hornekær, S. Morisset, G. Nyman, V. Pirronello, S. D. Price, V. Valdivia, G. Vidali, N. Watanabe
    Molecular Astrophysics 9, 1, (2017)
    
    
  • "Laboratory Studies of Methane and Its Relationship to Prebiotic Chemistry"
    K. Kobayashi, W. D. Geppert, N. Carrasco, N. G. Holm, O. Mousis, M. E. Palumbo, J. H. Waite, N. Watanabe, L. M. Ziurys
    Astrobiology 17, 786, (2017)
    
    
  • "Liquid-like behavior of UV-irradiated interstellar ice analog at low temperatures"
    S. Tachibana, A. Kouchi, T. Hama, Y. Oba, L. Piani, I. Sugawara, Y. Endo, H. Hidaka, Y. Kimura, K. Murata, H. Yurimoto, N. Watanabe,
    Science Advances 3, eaao2538 (2017)
    
    
  • "Fast crystalline ice formation at extremely low temperature through water/neon matrix sublimation"
    T. Hama, S. Ishizuka, T. Yamazaki, Y. Kimura, A. Kouchi, N. Watanabe, T. Sugimoto, V. Pirronello,
    Phys. Chem. Chem. Phys. 19, 17677 (2017)
    
    
  • "Comprehensive Study of Thermal Desorption of Grain surface Species by Accretion Shocks around Protostars"
    Hitoshi Miura, Tetsuo Yamamoto, Hideko Nomura, Taishi Nakamoto, Kyoko K. Tanaka, Hidekazu Tanaka, Makiko Nagasawa
    Astrophys. J. 839, 47(16pp) (2017)
    
    
  • "Hydrogenation and Deuteration of C₂H₂ and C₂H₄ on Cold Grains: A Clue to the Formation Mechanism of C₂H₆ with Astronomical Interest"
    Hitomi Kobayashi, Hiroshi Hidaka, Thanja Lamberts, Tetsuya Hama, Hideyo Kawakita, Johannes Kæstner, Naoki Watanabe
    Astrophys. J. 837, 155 (2017)
    
    
  • "Two types of amorphous protein particles facilitate crystal nucleation"
    Tomoya Yamazaki, Yuki Kimura, Peter G. Vekilov, Erika Furukawa, Manabu Shiraie, Hiroaki Matsumoto, Alexander E. S. Van Driessche, Katsuo Tsukamoto
    PNAS 114, 2154-2159 (2017)
    
    
  • "Simulations and Spectra of Water in CO Matrices"
    R. Escribano, E. Artacho, A. Kouchi, T. Hama, Y. Kimura, H. Hidaka, and N Watanabe
    Physical Chemistry Chemical Physics 19, 7280-7287 (2017)
    
    
  • "Evolution of morphological and physical properties of laboratory interstellar organic residues with ultraviolet irradiation"
    L. Piani, S. Tachibana, T. Hama, H. Tanaka, Y. Endo, I. Sugawara, L. Dessimoulie, Y. Kimura, A. Miyake, J. Matsuno, A. Tsuchiyama, K. Fujita, S. Nakatsubo, H. Fukushi, S. Mori, T. Chigai, H. Yurimoto and A. Kouchi
    The Astrophysical Journal 837, 35 (2017)
    
    
  • "Reactive Uptake of Gaseous Sesquiterpenes on Aqueous Surfaces"
    K. Matsuoka, Y. Sakamoto, T. Hama, Y. Kajii, S. Enami
    J. Phys. Chem. A 121, 810-818 (2017)
    
    
  2016
  
  • Selected as the Editors Choice "Matrix sublimation method for the formation of high-density amorphous ice"
    A. Kouchi, T. Hama, Y. Kimura, H. Hidaka, R. Escribano, N. Watanabe
    Chemical Physics Letters 658, 287-292 (2016)
    
    
  • "Deuterium Fractionation during Amino Acid Formation by Photolysis of Interstellar Ice Analogs Containing Deuterated Methanol"
    Y. Oba, Y. Takano, N. Watanabe, A. Kouchi
    Astrophys. J. Lett. 827, L18 (2016)
    
    
  • Selected as the Editors Choice "Negative catalytic effect of water on the reactivity of hydrogen abstraction from the C.H bond of dimethyl ether by deuterium atoms through tunneling at low temperatures"
    Y. Oba, N. Watanabe, A. Kouchi
    Chem. Phys. Lett. 662, 14 (2016)
    
    
  • "Hydrogen.deuterium substitution in solid ethanol by surface reactions at low temperatures"
    Y. Oba, K. Osaka, T. Chigai, A. Kouchi, N. Watanabe
    Mon. Not. Roy. Astron. Soc. 462, 689 (2016)
    
    
  • Selected as the Editors' Suggestion in PRL "Surface Temperature Dependence of Hydrogen Ortho-Para Conversion on Amorphous Solid Water"
    H. Ueta, N. Watanabe, T. Hama, A. Kouchi
    Physical Review Letters 116, 253201 (2016)
    
    
  • "Stepwise formation of H₃O⁺(H₂O)_n in an ion drift tube: Empirical effective temperature of association/dissociation reaction equilibrium in an electric field"
    Y, Nakai, H. Hidaka, N. Watanabe, T. M. Kojima
    J. Chem. Phys. 144, 224306 (2016)
    
    
  • "Statistical ortho-to-para ratio ofwater desorbed from ice at 10 kelvin"
    T. Hama, A. Kouchi, and N. Watanabe
    Science 351, 65 (2016)
    
  2015
  
  • "Signaturte of Quantum-Tunneling Diffusion of Hydrogen Atoms on Water Ice at 10 K"
    K. Kuwahata, T. Hama, A. Kouchi, and N. Watanabe
    Phys. Rev. Lett. 115, 133201 (2015)
    
    
  • Editors Choice!　"Chiral glycine formation on cold interstellar grains by quantumtunneling hydrogen.deuterium substitution reactions"
    Y. Oba, N. Watanabe, Y. Osamura, and A. Kouchi
    Chem. Phys. Lett. 634, 53-59 (2015)
    
    
  • "Quantum Tunneling Observed without its Characteristic Large Kinetic Isotope Effects"
    T. Hama, H. Ueta, A. Kouchi, and N. Watanabe
    PNAS 112, 7438-7443 (2015)
    
    
  2014
  
  • "Quantum Tunneling Hydrogenation of Solid Benzene and Its Control via Surface Structure"
    T. Hama, H. Ueta, A. Kouchi, N. Watanabe, and H. Tachikawa
    The Journal of Physical Chemistry Letters 5, 3843-3848 (2014)
    
    
  • "Reaction kinetics and isotope effect of water formation by the surface reaction of solid H₂O₂ with H atoms at low temperatures"
    Yasuhiro Oba, Kazuya Osaka, Naoki Watanabe, Takeshi Chigai and Akira Kouchi
    Faraday Discussion 168, 185-204 (2014)
    
  2013
  
  • "Hydrogen isotopic substitution of solid methylamine through atomic surface reactions at low temperatures: A potential contribution to the D/H ratio of methylamine in molecular clouds",
    Yasuhiro OBA,Takeshi CHIGAI, Yoshihiro OSAMURA, Naoki WATANABE, Akira KOUCH
    Meteoritics & Planetary Science 1-16 (2013):DOI: 10.1111/maps.12096
    
    
  • "Surface Processes on Interstellar Amorphous Solid Water: Adsorption, Diffusion, Tunneling Reactions, and Nuclear-Spin Conversion"
    Tetsuya Hama, Naoki Watanabe
    Chem. Rev. 113, 8783 (2013)
    
  2012
  
  • ”The Mechanism of Surface Diffusion of H and D Atoms on Amorphous Solid Water: Existence of Various Potential Sites”,
    T. Hama, K. Kuwahata, N. Watanabe, A. Kouchi, Y. Kimura. T. Chigai, V. Pirronello
    Astrophys. J. 757, 185 (2012)
    
    
  • “Water Formation Through a Quantum Tunneling Surface Reaction, OH + H₂, at 10 K", Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A. Kouchi,
    Astrophys. J. 749:67 (2012)
    
    
  2011
  
  • “Spin temperature of water molecules desorbed from the surfaces of amorphous solid water, vapor-deposited and produced from photolysis of a CH₄/O₂ solid mixture"
    T. Hama, N. Watanabe, A. Kouchi, and M. Yokoyama.
    Astrophys. J. Lett. 738, L15 (2011)
    
  
  
  • “FTIR study of ammonia formation via the successive hydrogenation of N atoms trapped in a solid N₂ matrix at low temperatures"
    H. Hidaka, M. Watanabe, A. Kouchi and N. Watanabe.
    Phys. Chem. Chem.l Phys. 13,15798 (2011)
    
  
  
  • “Experimental studies of surface reactions among OH radicals that yield H₂O and CO₂ at 40-60 K"
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, and V. Pirronello.
    Phys. Chem. Chem. Phys. 13, 15792 (2011)
    
  
  
  • “A theoretical and experimental study on translational and internal energies of H₂O and OH from the 157 nm irradiation of amorphous solid water at 90 K"
    S. Andersson, C. Arasa, A. Yabushita, M. Yokoyama, T. Hama, M. Kawasaki, C. M. Western and M. N. R. Ashfold.
    Phys. Chem. Chem. Phys. 13, 15810 (2011)
    
  
  
  • “Surface abundance change in vacuum ultraviolet photodissociation of CO₂ and H₂O mixture ices"
    T. Kinugawa, A. Yabushita, M. Kawasaki, T. Hama, and N. Watanabe.
    Phys. Chem. Chem. Phys. 13, 15785 (2011)
    
  
  
  • “Laboratory studies on the formation of formic Acid (HCOOH) in interstellar and cometary ices"
    C. J. Bennett, T. Hama, Y. S. Kim, M. Kawasaki, and R. I. Kaiser,
    Astrophys. J. 727, 27 (2011)
    
  
  
  • “Translational and rotational energy measurements of desorbed water molecules in their vibrational ground state following 157 nm irradiation of amorphous solid water”
    T. Hama, M. Yokoyama, A. Yabushita, M. Kawasaki, & N. Watanabe,
    Nucl. Instr. Methods B 269, 1011-1015 (2011)
    
    
  2010
  
  • “Formation of Carbonic Acid (H₂CO₃) by Surface Reactions of Non-energetic OH Radicals with CO Molecules at Low Temperatures”
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, & V. Pirronello,
    Astrophys. J. 722, 1598-1606. (2010)
    
    
  • “Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water”
    T. Hama, M. Yokoyama, A. Yabushita, & M. Kawasaki,
    J. Chem. Phys. 133, 104504 (2010)
    
    
  • “Direct measurements of hydrogen atom diffusion and the spin temperature of nascent H₂ molecule on amorphous solid water”
    N. Watanabe, Y. Kimura, A. Kouchi, T. Chigai, T. Hama, & V. Pirronello,
    Astrophys. J. Lett. 714, L233 (2010)
    
    
  • “A desorption mechanism of water following vacuum-ultraviolet irradiation on amorphous solid water at 90 K”
    T. Hama, M. Yokoyama, A. Yabushita, M. Kawasaki, S. Andersson, C.M. Western, M.N.R. Ashfold, R.N. Dixon, & N. Watanabe,
    J. Chem. Phys. 132, 164508 (2010)
    
    
  • “Direct evidence for ammonium ion formation in ice through ultraviolet-induced acid-base reaction of NH₃ with H₃O⁺”
    E-S. Moon, H. Kang, Y. Oba, N. Watanabe, & A. Kouchi,
    Astrophys. J. 713, 906 (2010)
    
    
  • “Experimental study of CO₂ formation by surface reactions of non-energetic OH radicals with CO molecules”
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, & V. Pirronello,
    Astrophys. J. Lett. 712, L174 (2010)
    
    
  • “Formation of Carbonic Acid (H₂CO₃) by Surface Reactions of Non-energetic OH Radicals with CO Molecules at Low Temperatures”
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, & V. Pirronello,
    Astrophys. J. 722, 1598-1606 (2010)
    
    
  • “Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water"
    T. Hama, M. Yokoyama, A. Yabushita, & M. Kawasaki,
    J. Chem. Phys. 133, 104504 (2010)
    
    
  • “Direct measurements of hydrogen atom diffusion and the spin temperature of nascent H₂ molecule on amorphous solid water"
    N. Watanabe, Y. Kimura, A. Kouchi, T. Chigai, T. Hama, & V. Pirronello,
    Astrophys. J. Lett. 714, L233 (2010)
    
    
  • “A desorption mechanism of water following vacuum-ultraviolet irradiation on amorphous solid water at 90 K"
    T. Hama, M. Yokoyama, A. Yabushita, M. Kawasaki, S. Andersson, C.M. Western, M.N.R. Ashfold, R.N. Dixon, & N. Watanabe,
    J. Chem. Phys. 132, 164508 (2010).
    
    
  • “Direct evidence for ammonium ion formation in ice through ultraviolet-induced acid-base reaction of NH₃ with H₃O⁺"
    E-S. Moon, H. Kang, Y. Oba, N. Watanabe, & A. Kouchi,
    Astrophys. J. 713, 906 (2010)
    
    
  • “Experimental study of CO₂ formation by surface reactions of non-energetic OH radicals with CO molecules”
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, & V. Pirronello,
    Astrophys. J. Lett. 712, L174 (2010)
    
    
  • “Reaction routes in the CO-H₂CO-d_n-CH₃OH-d_m system clarified from H (D) exposure of solid formaldehyde at low temperatures”
    H. Hidaka, M. Watanabe, A. Kouchi, & N. Watanabe,
    Astrophys. J. 702, 291 (2009)
    
    
  • “Formation mechanisms of oxygen atoms in the O(³P_J) state from the 157 nm photoirradiation of amorphous water ice at 90 K”
    T. Hama, A. Yabushita, M. Yokoyama, M. Kawasaki, & N. Watanabe,
    J. Chem. Phys. 131, 114511 (2009)
    
    
  • “Hydrogen isotope exchange and H(D) atom addition reaction of solid formaldehyde on amorphous solid water at low temperatures”
    H. Hidaka, M. Watanabe, A. Kouchi, & N. Watanabe,
    J. Phys. Conf. Ser. 194, 132024 (2009)
    
    
  • “Nonenergetic reactions between atomic hydrogen and molecules on interstellar grain surfaces”
    N. Watanabe, A. Kouchi. H. Hidaka, Y. Oba, & N. Miyauchi,
    J. Phys. Conf. Ser. 194, 012044 (2009)
    
    
  • “Formation mechanisms of oxygen atoms in the O(¹D₂) state from the 157 nm photoirradiation of amorphous water ice at 90 K”
    T. Hama, A. Yabushita, M. Yokoyama, M. Kawasaki, & N. Watanabe,
    J. Chem. Phys. 131, 114510 (2009)
    
    
  • “Formation of compact amorphous H₂O ice by codeposition of hydrogen atoms with oxygen molecules on grain surfaces”
    Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, & A. Kouchi,
    Astrophys. J. 701, 464-470(2009)
    
    
  • “Translational and rotational energy measurements of photodesorbed water molecules in their vibrational ground state from amorphous solid water”
    A. Yabushita, T. Hama, M. Yokoyama, M. Kawasaki, S. Andersson, R. N. Dixon, M. N. R. Ashfold, & N. Watanabe,
    Astrophys. J. Lett. 699, L80-L83 (2009)
    
    
  • “Production of multiply charged ions from the 4d photoionization of Cs⁺”
    T. Koizumi, T. M. Kojima, M. Sano, & N. Watanabe,?
    J. Phys. Conf. Ser. 163, 012099 (2009)
  • “Ice surface reactions: A key to chemical evolution in space”
    Naoki Watanabe & Akira Kouchi,
    Prog. Surf. Sci. 83, 439-489 (2008)
  • “Release of hydrogen molecules from the photodissociation of amorphous solid water and polycrystalline ice at 157 and 193 nm”
    A. Yabushita, T. Hama, D. Iida, N. Kawanaka, M. Kawasaki, N. Watanabe, M. N. R. Ashfold, & H-P. Loock,
    J. Chem. Phys. 129, 044501 (2008)
  • “Size distributions of chondrules and dispersed droplets caused by liquid breakup: An application to shock wave conditions in the solar nebula”
    T. Kadono, M. Arakawa, & A. Kouchi,
    Icarus, 197, 621 (2008)
  • “Measurements of energy partitioning in H2 formation by photolysis of amorphous water ice”
    A. Yabushita, T. Hama, D. Iida, N. Kawanaka, M. Kawasaki, N. Watanabe, M. N. R. Ashfold, & H-P. Loock,
    Astrophys. J. Lett., 682, L69 (2008)
  • “Formation of hydrogen peroxide and water from the reaction of cold hydrogen atoms with solid oxygen at 10 K”
    N. Miyauchi, H. Hidaka, T. Chigai, A. Nagaoka, N. Watanabe & A. Kouchi,
    Chem. Phys. Lett. 456, 27-30 (2008)
  • “Structural effects of ice grain surfaces on the hydrogenation of CO at low temperatures”
    H. Hidaka, N. Miyauchi, A. Kouchi & N. Watanabe,
    Chem. Phys. Lett. 456, 36-40 (2008)
  • “Laboratory Simulation of competition between hydrogenation and photolysis in the chemical evolution of H₂O-CO ice mixtures”
    N. Watanabe, O. Mouri, A. Nagaoka, T. Chigai, A. Kouchi & V. Pirronello,
    Astrophys. J. 668, 1001 (2007)
  • “Temperature, composition, and hydrogen isotope effect in the hydrogenation of CO at 10 - 20 K”
    H. Hidaka, A. Kouchi & N. Watanabe,
    J. Chem. Phys. 126, 204707 (2007)
  • “Effective rate constants for the surface reaction between solid methanol and deuterium atoms at 10 K”
    A. Nagaoka, N. Watanabe, & Akira Kouchi,
    J. Phys. Chem. A 111, 3016 (2007)
  • “Dependence of the effective rate constants for the hydrogenation of CO on the temperature and composition of the surface”
    N. Watanabe, A. Nagaoka, H. Hidaka, T. Shiraki, T. Chigai, & A. Kouchi,
    Planet. Space Sci., (2006) 54, 1107 (2006)

  Proceedings