Associate Professor, Masahiro FUNAHASHI, Ph.D (Profile)

Research Field: Organic Functional Materials, Organic Electronic Materials

List of Selected Publications

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  1. Development of Liquid-Crystalline Semiconductors with High Carrier Mobility and Their Application to Thin-Film Transistors
    M. Funahashi
    Polym. J., 41, 459-469 (2009).












  2. Liquid-Crystalline Semiconductors with Tetrafluorophenyl Group: Thin Film Structure and Carrier Transport
    F. Zhang, M. Funahashi, and N. Tamaoki
    Org. Electronics, 10, 73 (2009).
  3. Electrochromic Liquid Crystals Consisting of π-Conjugated and Ionic moieties
    S. Yazaki, M. Funahashi, and T. Kato, J. Am. Chem. Soc., 130, 13206-13207 (2008).
  4. Electron transport and electrochemistry of mesomorphic fullerenes with long-range ordered lamellae
    T. Nakanishi, Y. Shen, J. Wang, S. Yagai, M. Funahashi, T. Kato, P. Fernandes, H. Mohwald, and D. G. Kurth, J. Am. Chem. Soc., 130, 9236-9237 (2008).
  5. Side chain liquid crystal poly(fumarate)s bearing tolane-based mesogens
    H. Noguchi, T. Michinobu, N. Fujii, M. Funahashi, M. Tokita, J. Watanabe, and K. Shigehara, J. Polym. Sci. A, Polym. Chem., 46, 5101-5114 (2008).
  6. Liquid crystalline semiconductors with tetrafluorophenyl group: thin film structure and carrier transport
    F. Zhang, M. Funahashi*, and N. Tamaoki, Org. Electrinics, in press (2008).
  7. Ambipolar transport in the highly ordered smectic phase of 2-alkyl-5"-alkynylterthiophene derivative in a wide temperature range
    M. Funahashi*, F. Zhang, N. Tamaoki, and J. Hanna, ChemPhysChem, 9, 1465-1473 (2008).
  8. Field-effect transistors based on liquid crystalline oligothiophene semiconductors with solution process
    M. Funahashi*, F. Zhang, and N. Tamaoki, Proceedings of IDW ’07, 459-452 (2007).
  9. High-performance thin-film transistors from semiconducting liquid crystalline phases by solution processes
    F. Zhang, M. Funahashi*, and N. Tamaoki, Appl. Phys. Lett., 91, 063515 (2007).
  10. Study of unsymmetrical dimesogens containing 4-heptylazobenzene
    Aja Mallian, Masahiro Funahashi and Nobuyuki Tamaoki, J. Phys Org. Chem., 20, 878-883 (2007).
  11. Visible-light photo-responsibility of a 4-(dimethyl)azobenzene unit incorporated into single-strand DNA: demonstration of a large spectral change accompanying isomerization in DMSO and detection of rapid (Z)- to -(E) isomrization in aqueous solution
    T. Kamei, M. Kudo, H. Akiyama, M. Wada, J. Nagasawa, M. Funahashi, N. Tamaoki, T. Q. P. Uyeda, Eur. J. Org. Chem., 2007, 1846-1853.
  12. High ambipolar mobility in highly ordered smectic phase of dialkylphenylterthiophene derivative that can be applied to solution-processed organic field effect transistors
    M. Funahashi*, F. Zhang, and N. Tamaoki*, Adv. Mater., 19, 353-358 (2007).
  13. Effect of pretransitional organization in cholesteric phases of oligothiophene derivatives on their carrier transport characteristics
    M. Funahashi* and N. Tamaoki*, Chem. Mater., 19, 608-617 (2007).
  14. Organic Semiconductors with Helical Structure Based on Oligothiophene derivatives Exhibiting Chiral Nematic Phase
    M. Funahashi* and N. Tamaoki*, Mol. Cryst. Liq. Cryst., 475, 123-135 (2007).
  15. Carrier transport properties in liquid crystalline oligothiopehene semiconductors and their device applications
    M. Funahashi*, F. Zhang, N. Tamaoki, Proceedings of IDW’ 06, 19-22 (2006).
  16. Liquid Fullerene at Room Temperature: Unexpected Morphology of C60 Derivatives
    T. Michinobu, T. Nakanishi, J. P. Hill, M. Funahashi, and K. Ariga, J. Am. Chem. Soc., 128, 10384-10385 (2006).
  17. Bromothiophene Derivatives and Synthetic Application to Well-defined Oligothiophenes
    Masabumi Takahashi, Kentaro Masui, Hiroki Sekiguchi, Nobuhiko Kobayashi, Atsunori Mori,* Masahiro Funahashi, and Nobuyuki Tamaoki, J. Am. Chem. Soc., 128, 10930-10933 (2006).
  18. Electronic Carrier Transport in Liquid Crystalline Semiconductors - Increase in Carrier Mobility and Extension of Mesomorphic Temperature Range
    Masahiro Funahashi, Mol. Cryst. Liq. Cryst., 458, 3-10 (2006).
  19. Electronic conduction in the chiral nematic phase of the oligothiophene derivative
    Masahiro Funahashi* and Nobuyuki Tamaoki*, ChemPhysChem, 7, 1193-1197 (2006).
  20. New possibility for an organic semiconductor: a smectic liquid crystalline semiconductor having a long conjugated core and two long alkyl chains
    Yuichiro Haramoto, Yuko Kawada, Atushi Mochizuki, Masato Nanasawa, Seiji Ujiie, Masahiro Funahashi, Kohki Hiroshima, Takamasa Kato, Liq. Cryst., 32, 909-912 (2005).
  21. High carrier mobility up to 0.1 cm2/Vs at ambient temperatures in thiophene-based smectic liquid crystals
    M. Funahashi and J. Hanna, Adv. Mater., 17, 594-598 (2005).
  22. High Carrier Mobility up to 0.1 cm2/Vs and a wide mesomorphic temperature range of alkynyl-substituted terthiophene and quaterthiophene derivatives
    M. Funahshi and J. Hanna, Mol. Cryst. Liq. Cryst., 436, 1179-1189 (2005).
  23. Influence of chemical impurity on charge carrier transport in smectic liquid crystals
    M. Funahashi and J. Hanna, Chem. Phys. Lett., 397, 319 - 323 (2004).
  24. Charge transport in liquid crystalline semiconductor and crosslinked polymer composite
    N. Yoshimoto, M. Funahashi and J. Hanna, Mol. Cryst. Liq. Cryst., 409, 493-504 (2004).
  25. Mesomorphic behaviors and charge transport in terthiophene derivatives
    M.Funahashi and J. Hanna, Mol. Cryst. Liq. Cryst., 410, 529-540 (2004).
  26. Carrier transport in liquid crystalline semiconductors
    Masahiro Funahashi, Transworld Research Network, Recent Develop. of Appl. Phys., 6, 839-857 (2003).
  27. Modeling of electronic charge transport in smectic liquid crystals
    A. Ohno, K. Kurotaki, A. Haruyama, M. Funahashi, and J. Hanna, Proceedings of SPIE, 4991, 274-281 (2003).
  28. Enhanced light emission from self-organizing molecular semiconductors by using organic thin film transistors
    Y. Toko, M. Funahashi, and J. Hanna, Proceeding of SPIE, 4800, 229-237 (2003).
  29. Conductive liquid crystalline compounds having a piperazine structure
    Y. Haramoto, T. Yamada, M. Funahashi, J. Hanna, and S. Ujiie, Liquid Crystals, 29, 1109-1111(2002).
  30. Carrier transport properties in crosslinked polymer/liquid crystalline semiconductors
    N. Yoshimoto, M. Funahashi and J. Hanna, Mat. Res. Soc. Symp. Proc., 709, 147-152 (2002).
  31. Electro-optical characteristics of self-organizing molecular semiconductor aligned by polyimide film
    Y. Toko, M. Funahashi, and J. Hanna, Mol. Cryst. Liq. Cryst., 367, 1354 - 1361 (2002).
  32. Electrical properties of domain boundary in photoconductive smectic mesophases and their crystal phases
    H. Maeda, M. Funahashi, J. Hanna, Mol. Cryst. Liq. Cryst., 366, 2221-2228 (2001).
  33. Probe of molecular ordering in photoconductive smectic mesophases by transient photocurrent measurement
    M. Funahashi, and J. Hanna, Mol. Cryst. Liq. Cryst., 368, 303-310 (2001).
  34. Influence of domain boundaries on the carrier transport characteristics of the liquid crystalline semiconductors
    H. Maeda, M. Funahashi, and J. Hanna, Mol. Cryst. Liq. Cryst., 346, 183-192 (2000).
  35. Photosensitization of smectic photoconductive liquid crystals by C70-doping
    Z. Hong, M. Funahashi, J. Hanna Proceedings of SPIE, 3939, 126-134 (2000).
  36. High ambipolar carrier mobility in self-organizing terthiophene derivatives
    M. Funahashi and J. Hanna, Appl. Phys. Lett.,76, 2574-2576 (2000).
  37. New aspects of organic electric materials in calamitic liquid crysatlline semiconductors
    H. Maeda, M. Funahashi, and J. Hanna, Mater. Res. Soc. Symp. Proc., 598, BB3.61/1-6 (2000).
  38. Influence of domain boundaries on the carrier transport characteristics of the liquid crystalline semiconductors
    H. Maeda, M. Funahashi, and J. Hanna, Mol. Cryst. Liq. Cryst., 346, 183-190 (2000).
  39. Influence of domain boundaries on the carrier transport characteristics of the liquid crystalline semiconductors
    H. Maeda, M. Funahashi, and J. Hanna, Mol. Cryst. Liq. Cryst., 346, 183-190 (2000).
  40. Photo-electrical properties of a ferroelectric liquid crystalline photoconductor
    K. Kogo, H. Maeda, H. Kato, M. Funahashi, and J. Hanna, Appl. Phys. Lett., 75, 3348-3350 (1999).
  41. Photo-hole generation in smectic liquid crystalline photoconductor
    H. Zhang, H. Maeda, M. Funahashi, and J. Hanna, Proc. SPIE, 3799, 168-177 (1999).
  42. Microsecond photo-response in liquid crystalline photoconductor doped with C70 under illumination of visible light
    M. Funahashi and J. Hanna, Appl. Phys. Lett., 75, 2484 -2486 (1999).
  43. Carrier transport in calamitic mesophases of liquid crystalline photoconductor 2-phenylnaphthalene derivatives
    M. Funahashi and J. Hanna, Mol. Cryst. Liq. Cryst., 331, 2369-2376 (1999).
  44. Photoconductive anisotropy in smectic liquid crystalline photoconductor, 2-(4’-octylphenyl)-6-dodecyloxynaphthalene
    M. Funahashi and J. Hanna, Jpn. J. Appl. Phys., 38, L132-L135 (1999).
  45. Synthesis of medium-sized bicyclic compounds by intramolecular cyclization of cyclic β-keto radicals generated from cycropropanols using manganese(III) tris(pyridine-2-carboxylate) and its application to total synthesis of 10-isothiocyanoguaia-6-ene
    N. Iwasawa, M. Funahashi, S. Hayakawa, T. Ikeno, and K. Narasaka, Bull. Chem. Soc. Jpn., 72, 85-97 (1999).
  46. Photogeneration in smectic phenylnaphthalene liquid crystal
    H. Zhang, M. Funahashi, and J. Hanna, Proceedings of Pan-pacific imaging conference/Japan Hardcopy ’98, 179-182(1998).
  47. Photosensitization of liquid crystalline photoconductor with fullerene C70
    M. Funahashi and J. Hanna, Proceedings of Pan-pacific imaging conference/Japan Hardcopy ’98, 183-186 (1998).
  48. Polarized light emission from a calamitic liquid crystalline semiconductor doped with dyes
    K. Kogo, T. Goda, M. Funahashi, and J. Hanna, Appl. Phys. Lett., 73, 1595-1597 (1998).
  49. Anomalous high carrier mobility in smectic E phase of a 2-phenylnaphthalene derivatives
    M. Funahashi and J. Hanna, Appl. Phys. Lett., 73, 3733-3735 (1998).
  50. Fast ambipolar carrier transport in smectic phases of phenylnaphthalene liquid crystal
    M. Funahashi and J. Hanna, Appl. Phys. Lett., 71, 602-604 (1997).
  51. First electronic conduction with high hole mobility in smectic A phase of a calamitic liquid crystal
    M. Funahashi and J. Hanna, Mol. Cryst. Liq. Cryst., 304, 429-434 (1997).
  52. Fast Hole Transport in a New Calamitic Liquid Crystal of 2-(4’-Heptyloxyphenyl)-6-Dodecylthibenzothiazole
    M. Funahashi and J. Hanna, Phys. Rev. Lett., 78, 2184-2187 (1997).
  53. Photoconductive behavior in Smectic A Phase of 2-(4’-Heptyloxyphenyl)-6-dodecylthiobenzothiazole
    M. Funahashi and J. Hanna, Jpn. J. Appl. Phys., 35, L703-L705 (1996).
  54. Total synthesis of 10-isothiocyanatoguaia-6-ene
    N. Iwasawa, M. Funahashi, and K. Narasaka, Chem. Lett., 1697-1700 (1994).
  55. Synthesis of medium-sized bicyclic compounds by intramolecular cyclization of cyclic β-ketorals generated from cyclopropanols using manganese (III) tris(2-pyridinecarboxylate)
    N. Iwasawa, M. Funahashi, S. Hayakawa, and K. Narasaka, Chem. Lett., 545-548 (1993).
  56. Generation of β-carbonyl radicals from cyclopropanol derivatives by the oxidation with manganese (III) 2-pyridinecarboxylate and their reaction with electron-rich and deciceient olefins
    N. Iwasawa, S. Hayakawa, M. Funahashi, K. Isobe, and K. Narasaka, Bull. Chem. Soc. Jpn., 66, 819-827 (1993).