論文

ブロックコポリマー

  1. H. Hasegawa, T. Ohta, K. Ito, H. Yokoyama, "Stress-Strain Measurement of Ultra-Thin Polystyrene Films: Film Thickness and Molecular Weight Dependence of Crazing Stress", Polymer, 123(11), 179-183(2017).
  2. M. Inutsuka, H. Tanoue, N. L. Yamada, K. Ito and H. Yokoyama, “Dynamic contact angle on a reconstructive polymer surface by segregation”RSC Adv., 7, 17202-17207 (2017).
  3. S. Takahashi, N. L. Yamada, K. Ito, H. Yokoyama, "Inclusion Complex of α-Cyclodextrin with Poly(ethylene glycol) Brush", Macromolecules, 49(18), 6947-6952(2016).
  4. T. Shinkai, K. Sugiyama, K. Ito, H. Yokoyama, “Nanoporous fabrication of block copolymers via carbon dioxide swelling: Difference between CO2-swollen and nanoporous block copolymers” Polymer, 100, 19–27 (2016).
  5. Y. Tang, K. Ito, L. Hong, T. Ishizone, H. Yokoyama*, "Tunable Thermoresponsive Mesoporous Block Copolymer Membranes" Macromolecules, 49(20) , 7886-7896 (2016).
  6. T. Shinkai, K. Sugiyama, K. Ito, H. Yokoyama*, "Nanoporous fabrication of block copolymers via carbon dioxide swelling: Difference between CO2-swollen and nanoporous block copolymers" Polymer, 100 , 19-27 (2016).
  7. C. Dutriez, K. Satoh, M. Kamigaito, H. Yokoyama*, "Cross-linked nanocellular polymer films: water-and oil-repellent anti-reflection coating." Polymer Journal, 48 , 497-501 (2016).
  8. R. Ishige, T. Higuchi, X. Jiang, K. Mita, H. Ogawa, H. Yokoyama, H. Jinnai*, "Structural Analysis of Microphase Separated Interface in an ABC-Type Triblock Terpolymer by Combining Methods of Synchrotron-Radiation Grazing Incidence Small-Angle X-ray Scattering and Electron Microtomography." Macromolecules, 48(8) , 2697-2705 (2015).
  9. M. M. Ito, K. Ito, M. Shibayama, K. Sugiyama, H. Yokoyama*, "Phase Behavior of Block Copolymers in Selective Supercritical Solvent." Macromolecules, 48(11) , 3590-3597 (2015).
  10. T. Shinkai, M. Ito, K. Sugiyama, K. Ito, H. Yokoyama*, "Retrograde order-disorder transition of a semi-fluorinated block copolymer induced by supercritical carbon dioxide" Soft Matter, 9 , 10689-10693 (2013).
  11. M. Inutsuka, NL. Yamada, K. Ito, H. Yokoyama*, "High Density Polymer Brush Spontaneously Formed by the Segregation of Amphiphilic Diblock Copolymers to the Polymer/Water Interface" ACS Macro Letters, 2 , 265-268 (2013).
  12. H. Yokoyama*, "Small angle X-ray scattering studies of nanocellular and nanoporous structures" Polymer Journal, 45 , 3-9 (2013).
  13. T. Shinkai, M. Ito, K. Sugiyama, K. Ito, H. Yokoyama*, " Ordered and foam structures of semifluorinated block copolymers in supercritical carbon dioxide" Soft Matter, 8 , 5811-5817 (2012).
  14. C. Dutriez, K. Satoh, M. Kamigaito, H. Yokoyama*, "Nanocellular foaming of fluorine containing block copolymers in carbon dioxide: the role of glass transition in carbon dioxide", RSC Advances, 2 , 2821-2827 (2012).
  15. R. Zhang, C. Dutriez, K. Sugiyama, T. Ishizone, H. Yokoyama*, "Thermally robust nanocellular thin films of high-T-g semifluorinated block copolymers foamed with supercritical carbon dioxide", Soft Matter, 7, 4032-4038 (2011).
  16. J. Yamanaka, T. Kayasuga, M. Ito, H. Yokoyama, T. Ishizone*, "Synthesis of water-soluble poly[oligo(ethylene glycol) methacrylate]s by living anionic polymerization of oligo(ethylene glycol) vinyl ether methacrylates", Polymer Chemistry, 2 , 1837-1848 (2011).
  17. H. Yokoyama*, L. Li, C. Dutriez, Y. Iwakura, K. Sugiyama, H. Masunaga, S. Sasaki, H. Okuda, "Fabrication of Nanoporous Structures in Block Copolymer Using Selective Solvent Assisted with Compressed Carbon Dioxide", Macromolecules, 42 ,3559-3564 (2009).
  18. H. Yokoyama*, L. Li, C. Dutriez, Y. Iwakura, K. Sugiyama, H. Masunaga, S. Sasaki, H. Okuda, "Horizontally and vertically aligned polymeric nanosheets: CO2-induced morphological transition of block copolymer templates", Macromolecules, 41 ,8626-8631 (2008).
  19. T. Oka, C. He, K. Ito, C. Dutriez, H. Yokoyama, Y. Kobayashi, "Free Volume Expansion and Nanofoaming of Supercritical Carbon Dioxide Treated Polystyrene", J. Phys. Chem. 112, 12191-12194 (2008).
  20. T. Ishizone, A. Seki, M. Hagiwara, S. Han, H. Yokoyama, A. Oyane, A. Deffieux, S. Carlotti "Anionic Polymerizations of Oligo(ethylene glycol) Alkyl Ether Methacrylates: Effect of Side Chain Length and w-Alkyl Group of Side Chain on Cloud Point in Water", Macromolecules, 41, 2963-2967 (2008).
  21. R. Zhang, A. Seki, T. Ishizone, and H Yokoyama* "Reduced Hydrophobic Interaction of Polystyrene Surfaces by Spontaneous Segregation of Block Copolymers with Oligo (Ethylene Glycol) Methyl Ether Methacrylate Blocks: Force Measurements in Water Using Atomic Force Microscope with Hydrophobic Probes", Langmuir, 24, 5527-5533, (2008).
  22. C. Dutriez, K. Sato, M. Kamigaito, and H. Yokoyama*, "Nanometer Voids Prevent Crack Growth in Polymeric Materials", Macromolecules, 40, 7433-7436 (2007).
  23. H. Yokoyama*, C. Dutriez, L. Li, T. Nemoto, K. Sugiyama, S. Sasaki, H. Masunaga, M. Takata and H. Okuda "Grazing Incident Small Angle X-ray Scattering Study of Polymer Thin Films with Embedded Ordered Nanometer Cells" J. Chem. Phys., 127, 014904 (2007).
  24. L. Li, H. Yokoyama*, "Nanoscale Silica Capsules Ordered on a Substrate: Oxidation of Nanocellular Thin Films of Poly(styrene-b-dimethylsiloxane)" Angew. Chem. Int. Ed., 45, 6338-6341 (2006).
  25. T. Miyamae, H. Yokoyama, S. Han, T. Ishizone, "Surface Characterization of Block Copolymers with Water-soluble Block by using Sum-Frequency Generation Spectroscopy" e-Journal of Surface Science and Nanotechnology, 4, 515-520 (2006).
  26. L. Li, T. Nemoto, K. Sugiyama and H. Yokoyama*, "CO2 foaming in thin films of block copolymer containing fluorinated blocks" Macromolecules, 39, 4746-4755 (2006).
  27. T. Hayakawa, M. Seino, R. Goseki, T. Hirai, R. Kikuchi, M. Kakimoto, H. Yokoyama and S. Horiuchi, "Fabrication of Hierarchical Ordered Hybrid Structures over Multiple Length Scales: Self-Organizing Polyhedral Oligomeric Silsesquioxane (POSS) Functionalized Block Copolymer Templates" Polym. J., 38, 567-576 (2006).
  28. T. Hayakawa, T. Kouketsu, M. Kakimoto, H. Yokoyama and S. Horiuchi, "Patterned Surfaces in Self-Organized Block Copolymer Films with Hexagonally Ordered Microporous Structures" Macromolecular Research, 14, 52-58 (2006).
  29. T. Ishizone, S. Han, M. Hagiwara and H. Yokoyama*, "Synthesis and Surface Characterization of Well-Defined Amphiphilic Block Copolymers containing Poly[oligo(ethylene glycol) methacrylate] Segments", Macromolecules, 39, 962-970 (2006).
  30. A. A. El-Shehawy, H. Yokoyama, K. Sugiyama, and A. Hirao, "Precise Synthesis of Novel Chain-End-Functionalized Polystyrenes with a Definite Number of Perfluorooctyl Groups and Their Surface Characterization", Macromolecules, 38, 8285-8299 (2005).
  31. L. Li, H. Yokoyama*, "Aligning Single-Layer Cylinders of Block Copolymer Nanodomains using Soft Molding" Adv. Mater., 17, 1432-1436 (2005).
  32. T. Hayakawa and H. Yokoyama* "Chemically Heterogeneous Surface on Self-Organized Microporous Films" Langmuir, 21, 10288-10291 (2005).
  33. A. Oyane, T. Ishizone, M. Uchida, K. Furukawa,T. Ushida and H. Yokoyama*, "Spontaneously formed blood compatible surfaces on hydrophobic polymers: surface enrichment of a block copolymer with a water-soluble block" Adv. Mater. 17, 2329 (2005).
  34. H. Yokoyama* and K. Sugiyama, "Nanocellular structures in block copolymers with CO2-philic blocks using CO2 as a blowing agent: Crossover from micro- to nano-cellular structures with depressurization temperature", Macromolecules; 38, 10516-10522 (2005).
  35. H. Yokoyama*, T. Miyamae, S. Han, T. Ishizone, K. Tanaka, A. Takahara, and N. Torikai, "Surface Segregation of Block Copolymers with a Water-Soluble Block", Macromolecules, 38, 5180-5189 (2005).
  36. H. Yokoyama*, L. Li, T. Nemoto, K. Sugiyama, "Effects of Saturation Pressure of CO2 on Nanofoams nucleated from Block copolymer Nanodomains" Trans. MRS-J., 30, 627-630 (2005).
  37. L. Li, H. Yokoyama*, K. Sugiyama, T. Nemoto, "Facile Fabrication of Nanocellular Block Copolymer Thin Films using Supercritical Carbon Dioxide", Adv. Mater., 16, 1226-1229 (2004).
  38. H. Yokoyama* and K. Sugiyama, "Surface Hydrophobicity of Fluorinated Block Copolymers Enhanced by Supercritical Carbon Dioxide Annealing", Langmuir, 20, 10001-10006 (2004).
  39. H. Yokoyama*, L. Li, K. Sugiyama, T. Nemoto, "Tunable Nanocellular Polymeric Monoliths using Fluorinated Block Copolymer Templates and Supercritical Carbon dioxide", Adv. Mater., 16, 1542-1546 (2004).
  40. H. Yokoyama*, K. Tanaka, A. Takahara, T. Kajiyama, K. Sugiyama and A. Hirao, "Surface Segregation of Fluoroalkyl Side Group of Fluorinated Block Copolymers", Trans. MRS-J., 29, 279-282 (2004).
  41. H. Yokoyama*, K. Tanaka, A. Takahara, T. Kajiyama, K. Sugiyama and A. Hirao, "Surface Structure of Asymmetric Fluorinated Block Copolymers", Macromolecules, 37, 939-945 (2004).
  42. R. A. Segalman, H. Yokoyama and E. J. Kramer, "Graphoepitaxy of Spherical Domain Block Copolymer Films", Adv. Mater., 13, 1152-1155 (2001).
  43. H. Yokoyama and E. J. Kramer, "Diffusion of Triblock Copolymers in a Spherical Domain Structure", Macromolecules, 33, 954 (2000).
  44. H. Yokoyama, T. E. Mates, and E. J. Kramer, "Structure of Asymmetric Diblock Copolymers in Thin Films", Macromolecules, 33, 1888 (2000).
  45. H. Yokoyama, E. J. Kramer and G. H. Fredrickson, "Simulation of Diffusion of Asymmetric Diblock and Triblock Copolymers in a Spherical Domain Structure", Macromolecules, 33, 2249-2257 (2000).
  46. H. Yokoyama and E. J. Kramer, "Mutual Diffusion of Asymmetric Block Copolymers with Homopolymers", Macromolecules, 33, 1871 (2000).
  47. H. Yokoyama, E. J. Kramer, D. A. Hajduk and F. S. Bates, "Diffusion in Mixtures of Asymmetric Diblock Copolymers with Homopolymers", Macromolecules, 32, 3353 (1999).
  48. H. Yokoyama, E. J. Kramer, M. H. Rafailovich, J. Sokolov and S. A. Schwarz, "Structure and Diffusion of Asymmetric Diblock Copolymers in Thin Films: A Dynamic Secondary Ion Mass Spectrometry Study", Macromolecules, 31, 8826 (1998).
  49. H. Yokoyama and E. J. Kramer, "Self-Diffusion of Asymmetric Diblock Copolymers with a Spherical Domain Structure", Macromolecules, 31, 7871 (1998).
  50. H. Yokoyama, A. Takano, M. Okada, T. Nose, "Phase-diagram of Star-shaped Polystyrene Cyclohexane System: Location of Critical Point and Profile of Coexistence Curve", Polymer, 32, 3218 (1991).

( * : HY is the corresponding author)

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