Faculty Information, Institute for Chemical Research, Kyoto University   [ English | Japanese ]


YOKO, Toshinobu

Division of Materials Chemistry - Inorganic Photonics Materials -
Professor
Doctor of Engineer
URL:
E-mail: yokot@vidrio.kuicr.kyoto-u.ac.jp
Tel: 0774-38-3130
Fax: 0774-33-5212
Academic career
Research field
    Inorganic materials science
Current research
Selected publications
  1. Menaa B, Takahashi M, Tokuda Y, Yoko T, Organically Modified Siloxane Glass Films Prepared Via a Non-Aqueous Gel Coating Process and Doped With Optically Active Dyes Rhodamine 6G and Coumarin 152 Solid State Sci. 10, 1200-1208 (2008)
  2. Takahashi M, Uemura K, Maeda T, Yao JX, Tokuda Y, Yoko T, Costacurta S, Malfatti L, Innocenzi P, Bottom-Up and Top-Down Approach for Periodic Microstructures on Thin Oxide Films by Controlled Photo-Activated Chemical Processes J. Sol-Gel Sci. Techn. 48, 182-186 (2008)
  3. Menaa B, Takahashi M, Tokuda Y, Yoko T, Dispersion and Photoluminescence of Free-Metal Phtalocyanine Doped in Sol-Gel Polyphenylsiloxane Glass Films J. Photochem. Photobiol. A-Chem. 194, 632-636 (2008)
  4. Kuniyoshi M, Takahashi M, Tokuda Y, Yoko T, Preparation of phenyl-modified siloxane glasses with softening temperature controlled by Rapid Heat Treatment (RHT) Chem. Lett. 35, 1384-1385 (2006)
  5. Menaa B, Takahashi M, Tokuda Y, Yoko T, Preparation and Properties of Polyphenylsiloxane-based Hybrid Glass Thick-Films Obtained from a Non-Aqueous Coating Sol via a Single-Step Dip-Coating Opt. Mater. 29, 806-813 (2007)
  6. Kakiuchida H, Takahashi M, Tokuda Y, Masai H, Yoko T, Effect of organic group on structure and viscoelastic properties of organic-inorganic polysiloxane hybrid system J. Phys. Chem. B 111, 982-988 (2007)
  7. Mizuno M, Takahashi M, Tokuda Y, Yoko T, Substituent effect on the formation of organically-modified silicate-phosphate alternating copolymer through nonaqueous acid-base reaction J. Sol-Gel Sci. Technol. 44, 47-52 (2007)
  8. Menaa B, Takahashi M, Innocenzi P, Yoko T, Crystallization in hybrid organic-inorganic materials inducehd by self-organization in basic conditions Chem. Mat. 19, 1946-1953 (2007)
  9. Kuniyoshi M, Takahashi M, Tokuda Y, Yoko T, Thermosoftening Phenyl Siloxane glasses prepared via concentration of sol: Sol Concentration Method (SCM) J. Non-Cryst. Solids 353, 4162-4169 (2007)
  10. Takahashi M, Maeda T, Uemura K, Yao J, Tokuda Y, Kaji H, Marcelli A, Innocenzi P, Yoko T, Photo-induced formation of wrinkled microstructures with long-range order in thin oxide films Advanced Materials (in press)
  11. Niida H, Takahashi M, Uchino T, Yoko T, Preparation and structure of organic-norganic hybrid precursors for new type low-melting glasses J. Non-Cryst. Solids 306, 292-299 (2002)
  12. Takahashi M., Uchino T, Yoko T, Correlation between macro- and micro-structural changes in Ge:SiO2 and SiO2 glasses under intense uv irradiations J. Am. Ceram. Soc. 85(5), 1089-92 (2002)
  13. Uchino T, Takahashi M, Yoko T, Formation and decay mechanisms of electron-hole pairs in amorphous SiO2 Appl. Phys. Lett. 80(7), 1147-1149 (2002)
  14. Takahashi M, Ichii K, Tokuda Y, Uchino T, Nishii J, Fujiwara T, Yoko T, Photochemical reaction of Ge2+ in germanosilicate glasses under intense near-UV laser excitation J. Appl. Phys. 92, 3442-3446 (2002)
  15. Niida H, Takahashi M, Uchino T, Yoko T, Structure of organic-inorganic hybrid low-melting glasses from 29Si NMR and ab initio molecular orbital calculations J. Non-Cryst. Solids 311(2), 145-153 (2002)
  16. Zhao GL, Han GR, Takahashi M, Yoko T, Photoelectrochemical properties of sol-gel-derived Ti1-xVxO2 solid solution film photoelectrodes Thin Solid Films 410(1-2), 14-20 (2002)
  17. Uchino T, Takahashi M, Ichii K,Yoko T, Microscopic model of photoinduced and Pressure-induced UV spectral changes in germanosilicate glass Phys Rev B 65 (17), 172202/1-4 (2002)
  18. Juodkazis S, Matsuo S, Misawa H, Mizeikis V, Marcinkevicius A, Sun HB, Tokuda Y, Takahashi M, Yoko T, Nishii J, Application of femtosecond laser pulses for microfabrication of transparent media Applied Surface Science 197, 705-709 (2002)
  19. Uchino T, Sakoh A, Azuma M, Takano M, Takahashi M, Yoko T, A novel pressure-induced polymorphic transition from fumed silica to transparent amorphous SiO2 at room temperature J. Phys.: Condensed Matter 14(44), 11111-11114 (2002)
  20. Fujiwara T, Sawada T, Benino Y, Komatsu T, Takahashi M, Yoko T, Nishii J, Direct observation of second-harmonic generation from crystalline particles in Ge-doped SiO2 glass films Optics Express 11, 1598-1606 (2003).
  21. Uchino T, Sakoh A., Azuma M., Kohara S, Takahashi M, Takano M, Yoko T, Anelastic compression of nano-meter-sized silica particles under high pressure: a high-energy x-ray diffraction measurement Phys. Rev. B 67, [092202-1]-[092202-4] (2003).
  22. Takahashi M, Sakoh A, Ichii K, Tokuda T, Yoko T, Nishii J, Photosensitive GeO2-SiO2 films for ultraviolet laser writing of channel waveguides and Bragg gratings with Cr-loaded waveguide structure Appl. Opt. 42, 4594-98 (2003).
  23. Nishii J, Kintaka K., Nishiyama H, Takahashi M, Photosensitive and athermal glasses for optical channel waveguides J. Non-Cryst. Solids 326-7, 464-471 (2003).
  24. Fujiwara T, Sawada ., Honma T, Benino ., Komatsu T, Takahashi M, Yoko T, Nishii J, Origin of intrinsic second-harmonic generation in crystallized GeO2-SiO2 glass films Jpn. J. Appl. Phys. 42, 7326-30 (2003).
  25. Tokuda Y, Saito M, Takahashi M, Yamada K., Watanabe W, Itoh K Yoko T, Waveguide formation in niobium tellurite glasses by pico- and femtosecond laser pulses J. Non-Cryst. Solids 326-7, 472-475 (2003).
  26. Sakoh A., Takahashi M., Yoko T, Nishii J, Nishiyama H, Miyamoto I, Photochemical process of divalent germanium responsible for photorefractive index change in GeO2-SiO2 glasses Optics Express 11, 2673-88 (2003).
  27. Takahashi M, Tsukigi K., Enkhtuvshin D, Yoko T, Effective charge separation in TiO2/VO2/TiO2 multi-layered film electrodes prepared by a sputtering method J. Phys. Chem B 107, 13455-58 (2003).
  28. Niida H, Takahashi M, Uchino T, Yoko T, Preparation and structure of organic-inorganic hybrid low-melting phosphite glasses from phosphonic acid H3PO3 J. Mater. Res. 19, 1081-86 (2003).
  29. Niida H, Takahashi M, Uchino T, Yoko T, Preparation of organic-inorganic hybrid precursors O=P(OSiMe3)x(OH)3-x for low-melting glasses J. Ceram. Soc. Jpn 111, 171-5 (2003).
  30. Takahashi M, Niida H, Tokuda Y, Yoko T, Organic-inorganic hybrid phosphite low-melting glasses for photonics application J. Non-Cryst. Solids 326-7, 524-8 (2003).
  31. Uchino T, Yoko, T, Mechanism of electron localization at edge-sharing units in amorphous SiO2 Phys. Rev. B 68, [041201-1]-[041201-4] (2003).
  32. Tokuda Y, Uchino T, Yoko T, Ab initio study of NMR spectra of Li2S-SiS2 glass system J. Non-Cryst. Solids 330, 61-65 (2003).
  33. Niida H, Takahashi M, Uchino T, Yoko T, Spontaneous reduction of europium ions below 250°C in organic-inorganic hybrid low-melting phosphite glasses J. Mater. Res. 18, 1-3 (2003).
  34. Zhang J, Takahashi M, Tokuda Y, Yoko T, Preparation of Eu-doped CaGa 2S 4-CaS composite bicolor phosphor for white light emitting diode J. Ceram. Soc. Jpn 112, 511-513 (2004).
  35. Mori R; Takahashi M, Yoko T, 2D spinodal phase-separated TiO2 films prepared by sol-gel process and photocatalytic activity Mat. Res. Bull. 39, 2137-2143 (2004).
  36. Takahashi M, Sakoh A., Tokuda ., Yoko T, Nishii J, Nishiyama H, Miyamoto I, Photochemical process of divalent germanium responsible for photorefractive index change in GeO2-SiO2 glasses J. Non-cryst. Solids 345-6, 323-327 (2004).
  37. Yoshida Y, Muroi K, Otsuka A, Saito G, Takahashi M, Yoko T, 1-ethyl-3-methylimidazolium based ionic liquids containing cyano groups: synthesis, characterization, and crystal structure Inorg. Chem. 43, 1458-1462 (2004).
  38. Kakiuchida H, Takahashi M, Masai H, Kuniyoshi M, Tokuda Y, Yoko T, Relationship between viscoelastic properties and structure of organic-inorganic hybrid glass and supercooled liquid consisting of R 4-mSiOm/2 units Proc. XX ICG (Kyoto) O-07-054, 1-6 (2004).
  39. Tokuda Y, Takahashi M, Yoko T, Na environment in sodium silicate glasses by 23Na MQMAS NMR spectroscopy and ab initio MO calculations Proc. XX ICG (Kyoto) O-10-017, 1-6 (2004).
  40. Niida H, Miyabe D, Tokuda Y, Takahashi M, Yoko T, Na environment in sodium phosphate glasses by 23Na MQ-MAS NMR spectroscopy Proc. XX ICG (Kyoto) P-10-028, 1-4 (2004).
  41. Masai H, Takahashi M, Tokuda Y, Yoko T, Effect of the organic groups on the formation of siloxane network through gel-melting method Proc. XX ICG (Kyoto) P-11-009, 1-5 (2004).
  42. Menaa B, Takahashi M, Tokuda Y, Yoko T, Preparation and properties of organic-inorganic hybrid low-melting glass thick-films Proc. XX ICG (Kyoto) O-11-024, 1-5 (2004).
  43. Kuniyoshi M, Takahashi M, Tokuda Y, Yoko T, Preparation of organic-inorganic hybrid polysiloxane low-melting glasses with high ultraviolet transparency Proc. XX ICG (Kyoto) P-11-033, 1-4 (2004).
  44. Takahashi M, Tokuda Y, Yoko T, Organic-inorganic hybrid low-melting glasses for photonics applications Proc. XX ICG (Kyoto) O-13-020, 1-6 (2004).
  45. Mizuno M, Takahashi M, Tokuda Y, Yoko T, Reaction of phosphoric acid and chlorosilane as an acid-base pair for the formation of organic-inorganic hybrid low-melting glasses Proc. XX ICG (Kyoto) P-13-021, 1-4 (2004).
  46. Takahashi M, Tokuda Y, Yoko T, Photochemical reactions responsible for photorefractive index change in germanosilicate glasses Proc. XX ICG (Kyoto) O-14-048, 1-4 (2004).

Update: Apr 02,2012