Invited talks (after 2005)

• "Behavior of Carbon atoms on Ice", COSPAR: INTERSTELLAR ORGANIC MOLECULES IN THE AGE OF JWST AND ALMA, Busan, Korea, 19 July (2024)
  
  
• "Behavior of Carbon atoms on Ice at Low Temperatures", QuantumGrain Workshop: Emerging Horizons in the Chemistry of the Universe, Barcelona, Spain, 9-12 June (2024)
  
  
• "Observation of OH radical behaviors on ice by the PSD-REMPI method", The 3rd Laboratory Astrophysics Workshop, Kapaa, Kauai, Hawaii, USA, 18-22 February (2024)
  
  
• "Physicochemical Processes of OH Radicals on Ice at Low Temperatures", The 15th International Conference on the Physics and Chemistry of Ice (PCI-2023) , Sapporo, Japan, 3-8 September (2023)
  
  
• "Physicochemical processes on cosmic ice dust", The 13th meeting on Cosmic Dust , Kitakyushu, Japan, 7-11 August (2023)
  
  
• "Determination of the activation energy for diffusion of radicals on water ice", IAU Astrochemistry Symposium -From the First Galaxies to the Formation of Habitable Worlds , Traverse City, USA, 10-14 July (2023)
  
  
• “Negative Charge delivery in ice at 10 K: the role of surface OH radicals”, Conference on Chemistry and Physics at Low Temperature , Visegrad, Hungary, 3-8 July (2022)
  
  
• “Photostimulated desorption of OH radicals from ice surface: how the photon energy dissipates in visible region”, International Lorentz Center Workshop: Energy Dissipation at Interfaces: From Catalysis to Astrochemistry, Leiden, The Netherlands (online), 16-20 May, (2022)
  
  
• “Monitoring of OH radicals on ice surface under astrochemical conditions”,Origin and evolution of molecules in our Galaxy , Online, Russia, 21 April (2021)
  
  
• “Experimental approach to fast ortho to para nuclear spin conversion of hydrogen molecule on dust grain analogues”,COSPAR 2021, Chemical Evolution and Origin of Life , Online, Sydney, Australia, 29 January- 1 February (2021)
  
  
• “Clarifying a proton-hole transfer in ice by the new method of OH detection”, Frontier of structures and dynamics of water by advanced spectroscopic techniques , Online, Japan, 27 October (2020)
  
  
• “Behaviors of nuclear spins of hydrogen and water molecules on ice at very low temperatures: Implication to astrochemistry”, NSFC-CAS-JSPS Symposium on Nuclear Spin Isomers of Molecules and Molecular Spectroscopy, Shandong Univ., Jinan, China, 11-13 October (2019)
  
  
• “Behavior of OH radical on ice”,Water in the Universe in the ACS National Meeting, San Diego Convention Center, San Diego, USA, 25-29 August (2019)
  
  
• “Ortho-to-Para Ratios in water and H₂ desorbed from ice --Experimental view--”, Astrochemistry: From nanometers to megaparsecs - A symposium in honour of John H. Black , Gothenburg, Sweden, 24-28 June (2019)
  
  
• “Behavior of OH Radical on an Ice Surface at Low Temperatures”, 35th Symposium on Chemical Kinetics and Dynamics, Higashi-Hiroshima, Japan, 5-7 June (2019)
  
  
• “Detection of OH radicals on amorphous solid water”, IAU Symposium 350 Laboratory Astrophysics: From Observations to Interpretation , Cambridge, UK, 14-29 April (2019)
  
  
• “Infrared measurements on efficient chemical desorption of hydrogen sulfide from amorphous solid water”, Oxygen in Space , Cergy-Pontoise, Paris, France, 16-17 October (2018)
  
  
• “Measurements of activation energies for diffusion of hydrogen atom on pure CO solid ”, European Conference On Surface Science (ECOSS34) , Arhus, Denmark, 26-31 August (2018)
  
  
• “Infrared Measurements of Efficient Chemical Desorption of Hydrogen Sulfide from Amorphous Solid Water”,COSPAR 2018, The Evolving Chemical Universe: from proto-stars to the Origin of Life, Pasadena, Calfornia, USA, 26-28 July (2018)
  
  
• “Surface Chemistry of the ISM: Experimental Approach to grain surface processes”,The Olympian Symposium 2018 Gas and stars from milli- to mega- parsecs, Paralia Katerini, Greece, 28 May- 1 June (2018)
  
  
• “Strong temperature dependence of H₂ nuclear spin conversion on ice: what controls the rate?”, Dust and Ice Particles Spectroscopy and Scattering, the Instituto de Astrofisica de Andalucia, CSIC, Granada, Spain, 25-28 September (2017)
  
  
• “H₂ ortho-para conversion on amorphous solid water”,XXX International Conference on Photonic, Electronic, and Atomic Collisions, Cairns, Australia, 31 July (2017)
  
  
• “Ortho to Para Nuclear Spin Conversion of H₂ on Ice: a Key to Chemical Evolution in Space”,Prebiotic Chemistry in Space and Earth, the XXXVI biennial meeting of the Spanish Royal Society of Chemistry, Sitges, Spain, 27 June (2017)
  
  
• “Physicochemical processes on Ice Dust towards Deuterium Enrichment”,International Symposium on Molecular Spectroscopy, Champaign-Urbana, Illinois, USA, 19-23 June (2017)
  
  
• “Ortho-to-para ratios of hydrogen molecules desorbed from ice at around 10 K: What happens on cosmic ice dust?”,Expanding the Frontiers in Condensed Phase Astrochemistry: Electron Transfer Processes in Ices & Catalysis on Interstellar Grains in the 253rd ACS National Meeting, Parc 55 San Francisco, San Francisco, USA, 2-6 April (2017)
  
  
• “Deuterium chemistry and nuclear spin conversion on grain surfaces: implication to deuterium enrichment”,From Clouds to Protoplanetary Disks: the Astrochemical Link, Hans Harnack Haus, Berlin, Germany, 4-8 October (2015)
  
  
• “Grain Surface Chemistry: What Happens Without Photons and Ions”,From Interstellar Ices to PAHs A symposium to honor Lou Allamandola’s Contributions to the Molecular Universe, Annapolis, USA, 13-17 September (2015)
  
  
• “Role of Tunneling in the Formation and Deuterium Enrichment of Molecules on Dust Grains”, Astrobiology Science Conference 2015, Chicago, USA, 15-19 June (2015)
  
  
• “Experimental Approach to Chemistry of Cosmic Dust”,First general meeting of COST Action "Our Astrochemical Histry" CM1401, the Jaroslav Heyrovsky Institute of Physical Chemistry, Prague, Czech, 25-29 May (2015)
  
  
• “Experimental approach to nonenergetic physicochemical processes on icy grains”, Icy Grain Chemistry for Formation of Complex Organic Molecules: From Molecular Clouds to Protoplanetary Disks, Comets and Meteorites, Tokyo Institute of Technology, Tokyo, Japan, 5-7 March (2015)
  
  
• “What controls the diffusion mechanism of hydrogen atom on ice?”,Second Workshop on Experimental Laboratory Astrophysics , Kauai, Hawaii, USA, 23-26 Feb., (2015)
  
  
• “Nuclear spin temperatures of hydrogen and water molecules formed and trapped on ice”,Nuclear Spin Effects in Astrochemistry 2014, Gothenburg, Sweden, 9-11 June (2014)
  
  
• “Diffusion of hydrogen atom on amorphous solid water:Thermal or tunneling?", 247th ACS National Meeting and Exposition , Dallas, USA, 16-20 March (2014)
  
  
• “Physics and Chemistry of Hydrogen on Cosmic Dust: Diffusion, Spin Temperatures, and Water formation”, First Workshop on Experimental Laboratory Astrophysics , Kauai, Hawaii, USA, 25-27 Feb., (2013)
  
  
• “Physicochemical Processes of Hydrogen on Ice: A Key for Chemical Evolution in Space”, 2nd International Symposium on Hierarchy and Holism , Tokyo, Japan, 19-21 Feb., (2013)
  
  
• “Surface diffusion mechanism of atomic hydrogen and the ortho/para ratio of nascent H₂ molecule on amorphous solid water at around 10 K.”, International Lorentz Center Workshop: Dynamical Phenomena at Surfaces: The Role of Complexity , Leiden, The Netherlands, 26-30 Nov., (2012)
  
  
• “Grain surface processes at very low temperatures: hydrogen diffusion and tunneling reactions”, Gordon Research Conference, Radiation Driven Processes in Physics, Chemistry, Biology, and Industry , New Hampshir, USA, 29 Jul- 3 Aug (2012)
  
  
• “Spin temperatures of hydrogen and water molecules on amorphous solid water”, ASTROCHEM 2012 , Kolkata, India, 10-13 Jul (2012)
  
  
• “Hydrogen processes on dust grains: H atom diffusion and water formation”, 30th COSPAR Scientific Assembly , Mysore, India, 14-22 Jul (2012)
  
  “Hydrogen chemistry on cold grain surfaces”, XVIIIth Symposium on Atomic, Cluster, and Surface Physics , Alpe d'Huez, France, 22-27 Jan (2012)
  
  
• “Hydrogen tunneling reaction and its isotope effect at a low temperature ice surface: Origin of deuterium enrichments in interstellar formaldehyde and methanol”, International Conference on the Research of Chemistry and Physics of Matrix Isolated Species (MATRIX2011), Vancouver, Canada, 11 July (2011)
  
  
• “Ice surface chemistry of hydrogen atom in space”, 27th European Conference on Surface Science, Groningen, the Netherlands, 30 August (2010)
  
  
• “Surface processes of atomic hydrogen at very low temperatures relevant to astrochemistry”, 24th International Conference on Atomic Collisions in Solids, Krakow, Poland, 22 July (2010)
  
  
• “Chemisrty of atomic hydrogen on interstellar ice grains at very low temperatures” Western Pacific Geophysics Meeting: Laboratory Simulations for Astrophysics, Taipei, Taiwan, June 22-25, (2010)
  
  
• “Physicochemical processes of atomic hydrogen on amorphous solid water at very low temperatures” 239th American Chemical Society National Meeting & Exposition - San Francisco, USA, March 21-25, (2010)
  
  
• “Tunneling reactions of atomic hydrogen and molecules on amorphous solid water at very low temperatures”, Horiba-ISSP International Symposium on Hydrogen and Water in Condensed Matter Physics, Chiba, Japan, 12-16 October (2009)
  
  
• “Nonenergetic Reactions Between Hydrogen And Molecules On Interstellar Grain Surfaces”, XXVI International Conference on Photonic, Electronic, and Atomic Collisions, Michigan, USA, 22-28 July (2009)
  
  
• “Ice surface reactions: its role in chemical evolution in space”, ILTS International Symposium "Frontier of Low Temperature Science", Sapporo, Japan, 9-10 November (2009)
  
  
• “Reactions of Hydrogen Atoms and Molecules on Amorphous Solid Water at Very Low Temperatures”, Gordon Research Conference; Matrix-Isolated Species, Physics & Chemistry of, Oxford, UK, 19-24 July (2009)
  
  
• “Experimental approach to grain surface reactions of hydrogen and deuterium atoms”, International Lorentz Center Workshop: Interstellar Surfaces: From Laboratory to Models, Leiden, The Netherlands, 5-10 Oct., (2008)
  
  
• “Grain surface chemistry: fractionation routes”, The Molecular Universe: International Meeting on Physics and Chemistry of Interstellar Medium, Arcachon, France, 5-8 May (2008)
  
  
• “Laboratory study of chemical processes on interstellar ice grains”, Extraterrestrial ice, IUGG General Assembly 2007 , Perugia, Italy, 2-13 July (2007)
  
  
• “Simultaneous Irradiation Experiments of H₂O-CO Binary Ice with UV Photons and Cold H Atoms”, Asia-Oceania Geosciences Society Annual Meeting, Bangkok, Thailand, 3 August (2007)
  
  
• “Reactions of hydrogen and deuterium atoms with CO, formaldehyde, and methanol on ice grains”, International Astrophysics and Astrochemistry Meeting: Molecules in Space & Laboratory, Paris, France, 14-18 May (2007)
  
  
• “Formation of Simple Organic Molecules by Hydrogenation on Grain Surfaces”, International Astronomical Union Symposium: Astrochemistry, California, USA, 28 Augyst- 2 September. (2005)
  
  
• “Formation of deuterated methanol by surface reactions at 10 K”, Asia-Oceania Geosciences Society Annual Meeting , Singapore, (2005)
  
  
• “Evolution of CO molecule on dusts in dense core: formation of H₂CO and CH₃OH”, The 4th International Symposium on New Trends of Physics, Recent Advances in Astrophysics and Planetary Science ?from the early universe to the Solar system-, Sapporo, Japan, (2005)