Tadanori Koga
    Assistant Professor

Chemical and Molecular Engineering Program
Materials Sciences and Engineering
Stony Brook University
Stony Brook, New York
11794-2275

Old Engineering Building 318
Telephone: 631-632-8485
FAX: 631-632-8052
tkoga@notes.cc.sunysb.edu
     

Education

  • 1998 Ph.D., Physics, Kyushu University
  • 1993 M.S., Physics, Kyushu University
  • 1991 B.S., Physics, Kumamoto University

Professional Experience

  • 2006-Pres Assistant Professor, Stony Brook University.
  • 2001-2002 Joint Research Scientist, ChemMatCARS, Argonne National Laboratory
  • 2000-2006 Research Scientist, Materials Science & Engineering, SUNY at Stony Brook
  • 1998-2000 Post-doctoral Research Fellow, Chemistry, SUNY at Stony Brook
  • 1994-1998 Researcher, Hashimoto Polymer Phasing Project, ERATO, JAPAN
  • 1993-1994 Research Engineer, Mac Science Corporation, JAPAN

Research Areas

The 20th century has seen the material wealth of humankind explode beyond all previous imagining and is often called the era of "Material Civilization". It is no doubt that science, especially, chemistry and engineering, has played a central role in accomplishing it. On the other hand, we have created a mess in return for the richness of life: environmental pollution and depletion of natural resources. This egocentric attitude of human beings will no longer be possible. We must develop a harmonious coexistence with the global environment in order to sustain a vigorous economic society while making more efficient and effective use of "finite" resources. A new kind of chemical revolution, called "green chemistry", is rapidly brewing and is indispensable for the 21st century.

In order to put the concept of green chemistry into practice, I am focusing on the following systems of interest: (i) green nanofabrication of polymer thin films using supercritical carbon dioxide and (ii) chemical recycling of waste plastic using supercritical water. At the same time, (iii) methane hydrate as a future energy resource will be explored to support our nation's continued economic growth and energy security. The key for the above projects will lie in the development of rational design strategies. This could be achieved through a fundamental understanding of "mechanics" (dynamics, kinematics, statics) of molecules or assemblies of molecules and/or supramolecules by means of in-situ and real-time experimental tools. For this purpose, I have been integrating a variety of x-ray/neutron/light scattering techniques for both surface/interface and bulk/solution structure analysis at synchrotron/neutron scattering facilities including the National Synchrotron Light Source (NSLS, Upton), Advanced Photon Source (APS, Argonne), and National Institute of Standards and Technology (NIST, Gaithersburg).

As further applications of in-situ and real-time observation, self-assembling processes of soft matter systems (polymers, colloids, gels, membranes, etc.) under various external stimulants are also being studied for achieving a fundamental understanding of the targeted phenomena and for future commercial applications.

List of Publications in Refereed Journals

  1. Effect of Extinction on Neutron Diffraction Intensity of Silicon Single Crystal, (Y. Soejima, N. Aomine, H. Yamada, T. Koga and A. Okazaki) Jpn. J. Appl. Phys. 33 (1994) 5107-5108.
  2. Domain Population in SrTiO3 below the Cubic-to-Tetragonal Phase Transition, (T. Koga, Z. Lu, K. Munakata, M. Hatakeyama, Y. Soejima and A. Okazaki) Phase Transition 54 (1995) 109-116.
  3. Mixing Symmetric and Oblique Reflections in Rigid Channel-Cut Crystals, (M. Hart, T. Koga and Y. Takano) J. Appl. Cryst. 28 (1995) 568-570.
  4. Development of a High-Flux and High-Temperature-Set-Up Bonse-Hart Ultra Small-Angle X-ray Scattering (USAXS) diffractometer, (T. Koga, M. Hart, and T. Hashimoto) J. Appl. Cryst. 29 (1996) 318-324.
  5. Control of Crystallization of Ionic Silica Particles in Aqueous Dispersions by Sodium Hydroxide, (J. Yamanaka, T. Koga, N. Ise and T. Hashimoto) Phys. Rev. E 53 (1996) R4314-4317.
  6. Order-Disorder Transition in Aqueous Dispersions of Ionic Colloidal Silica Particles, (J. Yamanaka, T. Koga, N. Ise and T. Hashimoto) Colloid Polym. Sci. 106 (1997) 270-273.
  7. Phase Transition in Block Copolymers: Effect of Random Thermal Noise (T. Hashimoto, T. Koga, and T. Koga) World Scientific (1997) 33-36.
  8. Influence of Particles Charge Number on the Order-Disorder Transition in Electrostatically Stabilized Colloidal Dispersions, (J. Yamanaka, H. Yoshida, T. Koga, N. Ise and T. Hashimoto) World Scientific (1997) 59-63.
  9. Thermal-Noise Induced First-Order Phase Transition in Symmetric Block Copolymers : Behavior of Block Copolymer as a Complex Liquid, (T. Hashimoto, T. Koga, T. Koga and N. Sakamoto) World Scientific (1998) 291-301.
  10. Novel Crystallization Process in Dilute Ionic Colloids, (H. Yoshida, J. Yamanaka, T. Koga, N. Ise and T. Hashimoto) Langmuir 14 (1998) 569-574.
  11. Reentrant Solid-Liquid Transition in Ionic Colloidal Dispersions by Varying Particle Charge Density, (J. Yamanaka, H. Yoshida, T. Koga, N. Ise and T. Hashimoto) Phys. Rev. Lett. 80 (1998) 5806-5809.
  12. Ultra-Small-Angle X-ray Scattering Studies on Order-Disorder Transition in Diblock Copolymers, (T. Koga, T. Koga and T. Hashimoto) J. Chem. Phys. 110 (1999) 11076-11086.
  13. Development of ultra-small-angle x-ray scattering diffractometer, (T. Koga and T. Hashimoto) Oyo Butsuri 68, (1999) 308-309.
  14. Coexistence of Ordered and Disordered Phases in a Symmetric Diblock Copolymer near an Order-Disorder Transition Point, (T. Koga, T. Koga and T. Hashimoto) Phys. Rev. E. 60 (1999) R1154-1157.
  15. Transition between Ordered and Disordered Phases and their Coexistence in Dilute Ionic Colloidal Dispersions, (H. Yoshida, J. Yamanaka, T. Koga, T. Koga, N. Ise and T. Hashimoto) Langmuir 15 (1999) 2684-2702.
  16. Solid-Solid Phase Transformation in Soft Matters: Thermoreversible Transformation between BCC-Spheres and Hexagonal Cylinders in Block Copolymers, (T. Hashimoto, K. Kimishima and T. Koga), Phase Proceedings of International Conference on Solid-Solid Phase Transition ’99 (1999) 1377-1384.
  17. Crystallization of Charged Colloidal Silica Dispersions with Increasing Temperature, (J. Yamanaka, T. Koga, H. Yoshida, N. Ise, and T. Hashimoto) AIP 469, (1999) 144-145.
  18. Reentrant Order-Disorder Transition in Ionic Colloidal Dispersions by Varying Particle Charge Density, (J. Yamanaka, H. Yoshida, T. Koga, N. Ise, T. Hashimoto) Langmuir 15 (1999) 4198-4202.
  19. Long-Range Density Fluctuation in a Symmetric Diblock copolymer, (T. Koga, T. Koga and T. Hashimoto) Phys. Rev. E 60 (1999) R3501-3504.
  20. Order-Order Phase Transition between Spherical and Cylindrical Microdomain Structure of Block Copolymer I. Mechanism of the Transition, (K. Kimishima, T. Koga and T. Hashimoto) Macromolecules 33, (2000) 968-977.
  21. Geometrical Properties and Interface Dynamics: Time Evolution of Spinodal Interface in a Binary Polymer Mixture at the Critical Composition, (H. Jinnai, Y. Nishikawa, H. Morimoto, T. Koga, and T. Hashimoto) Langmuir 16 (2000) 4380-4393.
  22. High-Pressure Cell for Simultaneous Small-Angle X-ray Scattering and Laser Light Scattering Measurements, (T. Koga, S. Zhou, B. Chu, J. L. Fulton, S. Yang, C. K. Ober and B. Erman) Rev. Sci. Instrum. 72 (2001) 2679-2685.
  23. Dynamic Light Scattering Study of Self-Assembly of Diblock Copolymers in Supercritical Carbon Dioxide, (T. Koga, S. Zhou and B. Chu) Applied Optics 40 (2001) 4170-4178.
  24. The Effect of Carbon Black and Silica Fillers in Elastomer Blends, (Y. Zhang, S. Ge, B. Tang, T. Koga, M.H. Rafailovich, J.C. Sokolov, D.G. Peiffer, Z. Li, A.J. Dias, K.O. McElrath, M.Y. Lin, S.K. Satija, S.G. Urquhart, H. Ade, and D. Nguyen) Macromolecules 34 (2001) 7056-7065.
  25. Fluctuation-Induced Swelling of Polymer Thin Films-CO2 Systems at Gas-Supercritical Transition, (T. Koga, K. Shin, Y. Zhang, Y. Seo, M. H. Rafailovich, J. Sokolov, B. Chu, and S. Satija), J. Phys. Soc. Jpn. 70 (2001) 347-350.
  26. Density-Fluctuation-Induced Swelling of Polymer Thin Films in Carbon Dioxide, (T. Koga, Y. Seo, K. Shin, Y. Zhang, K. Kusano, K. Nishikawa, M. H. Rafailovich, J. Sokolov, D. Peiffer, B. Chu, and S. Satija) Phys. Rev. Lett. 89 (2002) 125506-1-4.
  27. Dynamics of Polymer Thin Films in Supercritical Carbon Dioxide, (T. Koga, Y. Seo, X. Hu, K. Shin, Y. Zhang, M. H. Rafailovich, J. C. Sokolov, B. Chu, and S. K. Satija) Europhys. Lett. 60 (2002) 559-565.
  28. The Role of Elasticity in the Anomalous Swelling of Polymer Thin Films in Density Fluctuating Supercritical Fluids, (T. Koga, Y. Seo, K. Shin, Y. Zhang, M. H. Rafailovich, J. C. Sokolov, B. Chu, and S. K. Satija) Macromolecules 36 (2003) 5236-5243.
  29. Low-Density Polymer Thin Film Formation in Supercritical Fluids, (T. Koga, Y. Seo, J. Jerome, S. Ge, O. H. Seeck, M. H. Rafailovich, J. C. Sokolov, M. Tolan, R. Rolb, and B. Chu) Appl. Phys. Lett. 83 (2003) 4309-4311.
  30. Neutron Reflectivity Study of Glassy Polymer Brushes in Density Fluctuating Supercritical Carbon Dioxide, (T. Koga, Y. Ji, Y. Seo, C. Gordon, S. Qu, M. H. Rafailovich, J. C. Sokolov, and S. K. Satija) Journal of Polymer Science, Part B Polymer Physics 42 (2004) 3282-3289.
  31. Novel Structure and Dynamics of Polymer Thin Films in Supercritical Fluids: Effect of Density Fluctuations, (T. Koga), Kobunshi Ronbunshu 61 (2004) 458-467.
  32. The Effect of Density Fluctuations in Supercritical Fluids: New Science and Technology for Polymer Thin Films, (T. Koga, E. Akashige, M. H. Rafailovich, J. C. Sokolov, K. Shin, Y.-S. Seo, S. K. Satija, and B. Chu), Physica B 357 (2005) 73-79.
  33. Surface Modification of Polymeric Nanocomposite Thin Films using Supercritical Carbon Dioxide, (T. Koga, C. Li, M. H. Rafailovich, J. C. Sokolov, and D Mahajan), Topics in Catalysis 32, (2005) 257-262.
  34. 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.
  35. 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.
  36. Effect of Density Fluctuating Supercritical Carbon Dioxide on Polymer Interfaces, (T. Koga, J, Jerome, Y. S. Seo, M. H. Rafailovich, J. C. Sokolov, and S. K. Satija), Langmuir 21, (2005) 6157-6160.
  37. Metalizable Polymer Thin Films in Supercritical Carbon Dioxide, (T. Koga, J. L. Jerome, C. Gordon, M. H. Rafailovich, and J. C. Sokolov), The Journal of Adhesion, 81, (2005) 751-764.
  38. Low-Temperature Reactive Coupling at Polymer-Polymer Interfaces Facilitated by Supercritical CO2, (S. E. Harton, F. A. Stevie, R. J. Spontak, T. Koga, M. H. Rafailovich, J. C. Sokolov, and H. Ade), Polymer, 46 (2005) 10173-10179.
  39. Structure Factors of Filler Dispersible Units in Rubbers, (T. Koga, M. Takenaka, K. Aizawa, M. Nakamura, T. Hashimoto), Langmuir, 21, (2005) 11409-11413.
  40. 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.
  41. Characterization of Palladium Nanoparticle by using x-ray reflectivity, EXAFS and Electron Microscopy (Y. Sun, R. Isseroff, C. Shorbrun, M. Forman, A. Frenkel, K. Shin, T. Koga, H. White, M. Rafailovich, and J. Sokolv), Langmuir 22, (2006) 807-816.
  42. 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.
  43. 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, J. Sokolov, and M.H. Rafailovich), Macromolecules, 39 (2006) 2972-2980.
  44. Green Thin Polymer Film Metallization using Supercritical Carbon Dioxide (T. Koga, J. Jerome and M. Rafailovich), J. Appl. Cryst. submitted.
  45. Crystallization in conjugated diblock copolymers in melt, (M. Lee, D. Cookson, B. Lin, M. Meron, T. Koga, H. Wang and L. Yu), Macromolecules submitted.
  46. Hierarchical Structures of Carbon Black Filler in Elastomers as Studied by Combined Scattering Methods (USANS, USAXS and SAXS), (T. Koga, M. Takenaka, N. Amino, M. Nakamura, K. Aizawa, D.Yamaguchi, S. Koizumi, S. Toki, and T. Hashimoto), Polymer submitted.

Review Articles

  1. Supercritical Carbon Dioxide as a Solvent for Polymer Thin Films, (T. Koga, M. H. Rafailovich, J. C. Sokolov, B. Chu) Current Topics in Colloid & Interface Science 5, (2002) 271-290.
  2. Supercritical fluid processing of polymer thin films: An x-ray study of molecular-level porosity, (T. Koga, J. Jerome, M. H. Rafailovich, B.Chu, J. Douglas, S. Satija), Advances in Colloids and Interface Science, in press.

Books

  1. Thermoreversible Order-Disorder Transition between Spherical and Cylindrical Microdomain Structures of Block Copolymers, (K. Kimishima, T. Koga, Y. Kanazawa and T. Hashimoto), Scattering from Polymers Characterization by X-rays, Neutrons and Lights, ACS Symposium Series 739, Chapter 32, Page 514-530, Eds. P. Cebe, B. Hsiao and D.J. Lohse, American Chemical Society (2000).

Patents

  1. Reversible crystallization ionic colloid system by temperature change and manufacture of colloid crystal using the system, (J. Yamanaka, T. Koga, H. Yoshida and T. Hashimoto) Jap. Pat. Appl. Laid-Open 10-145095, (1998); Jap. Pat. 3025233.
  2. Low density, low dielectric, metalizable polymer films, (T. Koga, M. H. Rafailovich, B. Chu, J. Jerome), U.S. Pat. Appl. Publ. (2005); Pat. 20050234220.
  3. Selective Permeable Polymer Membrane for Gases, (T. Koga, M. H. Rafailovich, E. Akashige), submitted to US patent.
  4. Environmentally safe etching agent for metallized polycarbonate (T. Koga, M. H. Rafailovich, R. S. Holzer, M. Bronner), submitted to US patent.

Scholarships and Awards

  1. Visiting Scientist (July-Aug. 2004), Chemistry, Kyoto University, Japan.
  2. Chairman's Fund Award (2003), Gordon Research Conferences, Elastomers.
  3. Visiting Scientist (Nov-Dec. 2002), National Institute of Standards and Technology, USA.
  4. Visiting Scientist (June-July 2002), Physics, Dortmund University, Germany.
  5. Chairman's Fund Award (2002), Gordon Research Conferences, Polymer Physics.
  6. Visiting Scientist (June-July 2001), Physics, Dortmund University, Germany.
  7. Chairman's Fund Award (2001), International Neutron Scattering Conference.

Invited Presentations

  1. Invited talk, ACS conference, April 2002, Orland, USA.
  2. Invited seminar, the Advanced Photon Source, Feb. 2003. Argonne, USA.
  3. Invited seminar (COE special seminar), Kyoto University, Jan. 2004, Japan.
  4. Invited talk, 8th International Conference on Surface X-Ray and Neutron Scattering, July 2004, Bad Honnef, Germany.
  5. Invited talk, 167th ACS Rubber Division Spring meeting, May 2005, Texas, USA.
  6. Invited seminar, Rensselaer Polytechnic Institute, Jan. 2006, Toroy, USA.
  7. Invited talk, Buried Interface Science with X-rays and Neutrons 2006, July 2006, Yokohama, Japan.
  8. Invited Seminar, Asahi Kasei Co., July 2006, Fuji, Japan.
  9. Invited talk, International conference on Small-angle Scattering (SAS2006), June 2006, Kyoto, Japan.
  10. Invited seminar, Sumitomo Rubber Industries, July 2006, Japan.
  11. Invited seminar, Yamagata University, July 2006, Yamagata, Japan.
  12. Invited seminars, The Institute for Solid State Physics, The University of Tokyo, Aug. 2006, Chiba, Japan.
  13. Invited seminar, Kyushu University, Aug. 2006, Fukuoka, Japan.

Research Support

ACTIVE:

  1. PI for the NY-CAIST Program, Extremely Low-Dielectric Constant Polymer Films using Supercritical Fluids , Semiconductor Research Corporation (Feb. 1, 2005-Jan. 31, 2008) $270,000

Professional Associations

  • American Physical Society
  • American Chemical Society
  • American Chemical Society, Rubber Division
  • Society of Polymer Science, Japan
  • Physical Society of Japan

Please look at the faculty and facilities of the Stony Brook Materials Department.

10/03/2006 JQ