Koga, Tadanori - Stony Brook University

研究领域

Our research aims to develop new enviromentally "green" processing to manipulate a variety of polymer surfaces and functionalities. -What is "Green Processing"? Public concern about environmental issues is growing and it's important for us to learn more about being “greening”. Especially for the chemical industry, they are under considerable pressure to replace many existing processes by new technology with preferably zero or at least much less generation of chemical waste and impact on the environment as well. One of the keys to establish "green processing" is the use of sustainable solvents; e.g. supercritical fluids (SCFs).

近期论文

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Effect of CO2 on a mobility gradient of polymer chains near an impenetrable solid (N. Jiang, L. Sendogdular, X. Di, M. Sen, P. Gin, M. K. Endoh, T. Koga, B. Akgun, M. Dimitriou, S. Satija), Macromolecules, DOI:10.1021/ma502591x Pathways of Cylindrical Orientations in PS-b-P4VP Diblock Copolymer Thin Films upon Solvent Vapor Annealing (E. B. Gowd, T. Koga, K. Kumar, M. Stamm), Soft Matter, 10 (2014) 7753-7761. PDF Recrystallization/dewetting of ultrathin PEO films via carbon dioxide annealing: The effects of polymer adsorbed layers (M. Asada, N. Jiang, L. Sendogdular, J. C. Sokolov, M. K. Endoh, T. Koga, M. Fukuto, L. Yang, B. Akgun, M. Dimitriou, S, Satija), Soft Matter (Front cover), 10 (2014) 6363-6590. PDF Formation mechanism of high-density, flattened polymer nanolayers adsorbed on planar solids (N. Jiang, J. Shang, X. Di, M. K. Endoh, T. Koga), Macromolecules, 47 (2014) 2682-2689. PDF Glass transition temperature of polymer-nanocomposites: Effects of polymer-particle interfacial energy (F. Chen, A. Clough, B. M. Reinhard, M. W. Grinstaff, N. Jiang, T. Koga, O.K.C. Tsui), Macromolecules, (2013), 46, 4663-4669. PDF Revealed architectures of adsorbed polymer chains at the solid-polymer melt interfaces (P. Gin, N. Jiang, C. Liang, T. Taniguchi, B. Akgun, S. Satija, M. K. Endoh, T. Koga), Phys. Rev. Lett., 109 (2012) 265501-1-5. PDF Heterogeneous lamellar structures near the polymer/substrate interface (M. Asada, N. Jiang, L. Sendogdular, P. Gin, Y. Wang, M. K. Endoh, T. Koga, M. Fukuto, D. Schultz, M. Lee, X. Li, J. Wang, M. Kikuchi, A. Takahara), Macromolecules, 45 (2012) 7098-7106. PDF Impact of an Irreversibly Adsorbed Layer on Local Viscosity of Nanoconfined Polymer Melts (T. Koga, N. Jiang, P. Gin, M. K. Endoh, S. Narayanan, L. B. Lurio, and S. K. Sinha), Phys. Rev. Lett., 107 (2011) 225901-1-5. PDF Immobilized Polymer Layers on Spherical Nanoparticles (S. E. Harton, S. K. Kumar, H. Yang, T. Koga, K. Hicks, H. Lee, J. Mijovic, M. Liu, R. S. Vallery, and D. W. Gidley), Macromolecules, 43 (2010) 3415-3421. PDF Reduced Viscosity of Free Surface in Entangled Polymer Melt Films (T. Koga, C. Li, M. K. Endoh, J. Koo, M. Rafailovich, S. Narayanan, D. R. Lee, L. B. Lurio, and S. K. Sinha), Phys. Rev. Lett., 104 (2010) 066101-1-4. PDF Stabilizing Thin Film Polymer Bilayers against Dewetting Using Multi-Walled Carbon Nanotubes (J. Koo, K. Shin, Y.-S.Seo, T. Koga, S. Park, S. K. Satija, X. Chen, K. Yoon, B. Hsiao, J. C. Sokolov, and M. H. Rafailovich), Macromolecules, 40 (2007) 9510-9516. Effect of Nano-scopic Fillers on Dewetting Dynamics, (J. H. Xavier, S. Sharma, Y.S. Seo, R. Isseroff, T. Koga, H. White, A.Ulman, K. Shin, Satija S. K. J. Sokolov, and M.H. Rafailovich), Macromolecules, 39 (2006) 2972-2980. The Effect of Surface Interactions on the Viscosity of Polymer Thin Films (C. Li, H. Kim, C. Li, J. Jiang, T. Koga, L.Lurio S. A .Schwarz, S. Narayanan, S. K. Sinha, M. H. Rafailovich, and J. C. Sokolov), Europhys. Lett.,73 (2006) 899-905. Investigation of Polystyrene Segregation at a Poly(cyclohexyl methacrylate)/Poly(methyl methacrylate) Interface (S. Harton, T. Koga, F. Stevie, T. Araki, and H. Ade), Macromolecules, 38, (2005) 10511-10515. Measuring Viscosity by Observing the Dewetting Velocity, (C. Li, T. Koga, C. Li, J. Jiang, S. Sharma, S. Narayanan, L.B. Lurio, S.K. Sinha, S. Billet, D. Sosnowik, M. H. Rafailovich and J. C. Sokolov), Macromolecules 38, (2005) 5144-5151. Deviations from liquid-like behavior in molten polymer films at interfaces (Y. Seo, T. Koga, M. Tolan, M. H. Rafailovich, J. C. Sokolov, and S. K. Sinha), Phys. Rev. Lett. 94, (2005) 157802-1-4.