 | Hiroshi Imanaka Assistant Research ScientistAstrobiology; Planetary atmospheres Ph.D., 2004, University of Tokyo Kuiper #523D 621-7984  Years with LPL: 2010 to present RESEARCH INTERESTS Dr. Imanaka's major research interest is the inventory and evolution of the volatile CHNOS elements in planetary atmospheres, planetary surfaces, and, the early solar system towards the understanding of the origin and evolution of life and habitable environments. He is working on comprehensive laboratory studies of complex organic chemistry related to the atmospheres of Titan and the early Earth. He studies characteristic fingerprints (elemental/isotopic composition, structure, and spectroscopic characteristics) in plausible organic macromolecules in planetary environments. A comprehensive understanding of such fingerprints is a key for constraining the physical-chemical environments, elemental cycles, and energy balance from available, or potentially available, sets of astronomical/planetary/geological observations. CURRENT GRANTS
ADS PUBLICATIONS SEARCH NASA ADS Author search: H. Imanaka SELECTED PUBLICATIONS West, R., et al. "Titan Haze", a Chapter for a Book entitled "Titan: Surface, Atmosphere and Magnetosphere", Edited by Mueller-Wodarg, I., Griffith, C., Lellouch, E., Cravens, T., Cambridge University Press, in press. Imanaka, H., et al. Optical constants of Titan tholins at mid-infrared wavelengths (2.5-25 μm) and the possible chemical nature of Titan's haze particles 2012Icar..218..247I He, C., et al. Structural Investigation of Titan Tholins by Solution-State 1H, 13C, and 15N NMR: 1-Dimentional and Decoupling Experiments, J. Phys. Chem. A, 116, 4760-4767, 2012. He, C., et al. Structural Investigation of HCN Polymer Isotopomers by Solution-State Multidimensional NMR, J. Phys. Chem. A, 116, 4751-4759, 2012. Lavvas, P., et al. Surface Chemistry and Particle Shape: Processes for the Evolution of Aerosols in Titan's Atmosphere 2011ApJ...728...80L Imanaka, H., Smith, M. A. From the Cover: Formation of nitrogenated organic aerosols in the Titan upper atmosphere 2010PNAS..10712423I Smith, M.A., Imanaka, H., Complex Organic Carbon on Abiotic Solar System Bodies; Titan as a model, Geochem. News, 142, Jan., 2010. Imanaka, H., Smith, M. A. EUV Photochemical Production of Unsaturated Hydrocarbons: Implications to EUV Photochemistry in Titan and Jovian Planets 2009JPCA..11311187I Neish, C. D., et al. Rate Measurements of the Hydrolysis of Complex Organic Macromolecules in Cold Aqueous Solutions: Implications for Prebiotic Chemistry on the Early Earth and Titan 2008AsBio...8..273N Sekine, Y., et al. The role of organic haze in Titan's atmospheric chemistry. II. Effect of heterogeneous reaction to the hydrogen budget and chemical composition of the atmosphere 2008Icar..194..201S Sekine, Y., et al. The role of organic haze in Titan's atmospheric chemistry. I. Laboratory investigation on heterogeneous reaction of atomic hydrogen with Titan tholin 2008Icar..194..186S Imanaka, H., Smith, M. A. Role of photoionization in the formation of complex organic molecules in Titan's upper atmosphere 2007GeoRL..3402204I McGuigan, M., Sacks, R., Waite, J.H., Imanaka, H., Analysis of Titan Tholin Pyrolysis Products by Comprehensive Two-Dimensional Gas Chromatography-Time-of-Flight Mass Spectrometry, J. Chromatogr. A. 1182, 280-288, 2006. Cruikshank, D. P., et al. Tholins as coloring agents on outer Solar System bodies 2005AdSpR..36..178C Imanaka, H., et al. Laboratory experiments of Titan tholin formed in cold plasma at various pressures: implications for nitrogen-containing polycyclic aromatic compounds in Titan haze 2004Icar..168..344I Khare, B., et al. Proton Irradiation of Carbon Nanotubes 2003NanoL...3..643K Khare, B. N.; Wilhite, P.; Quinn, R. C.; Chen, B.; Schingler, R. H.; Tran, B.; Imanaka, H.; So, C. R.; Bauschlicher, C. W., Jr.; Meyyappan, M., Functionalization of Carbon Nanotubes by Ammonia Glow-Discharge: Experiments and Modeling, J. Phys. Chem. B., 108, 8166-8172, 2004. Khare, B. N., et al. A glow-discharge approach for functionalization of carbon nanotubes 2002ApPhL..81.5237K Khare, B. N., et al. Analysis of the Time-Dependent Chemical Evolution of Titan Haze Tholin 2002Icar..160..172K |
