Engineering

62	Sharma, A.; Katiyar, M.; Deepak, G.; Seki, S. ; Tagawa, S. (Institute of Scientific and Industrial Research) Room Temperature Ultraviolet Emission at 357 nm from Polysilane Based Organic Light Emitting Diode Applied Physics Letters, 88, 143511 (2006) We have fabricated an organic light emitting diode using poly( n -butylphenylsilane) which has an emission in deep ultraviolet at 357 nm at room temperature. The polysilane electroluminescence(EL) devices emit ultraviolet light with a turn-on voltage of 8 V. The EL spectrum is identical to the photoluminescence(PL) spectrum of the polysilane thin film. We also observe an additional emission in the visible region, which is not present in the PL spectrum. The visible emission has a color coordinate of (0.36, 0.35), which can be modulated to a required white light coordinate by down converting the ultraviolet emission.

63	Yoshimoto, N.; Yoshimoto, M.; Yasuhara, K.; Shimanouchi, T. ; Umakoshi, H.; Kuboi, T. (Graduate School of Engineering Science) Evaluation of Temperature and Guanidine Hydrochloride-Induced Protein-Liposome Interactions by Using Immobilized Liposome Chromatography Journal of Chromatography, 29, 174-181 (2006) Hydrophobic interactions between nine model proteins and net-neutral lipid bilayer membranes (liposomes) under stress conditions were quantitatively examined by using immobilized liposome chromatography (ILC). The specific capacity factor of the proteins characteristic for the ILC and the amount of calcein released from immobilized liposome were successfully expressed as a function of the product of the local hydrophobicities of proteins and liposomes, regardless of protein species and the type of the stress conditions applied (denaturant and heating).

64	Hirasawa, T. 2; Nakakura, Y. 2; Yoshikawa, K. 1; Ashitani, K. 2; Nagahisa, K. 1; Furusawa, C. 1; Katakura, Y. 2; Shimizu, H. 1; Shioya, S. 2 1 (Graduate School of Information Science and Technology) 2 (Graduate School of Engineering) Comparative Analysis of Transcriptional Responses to Saline Stress in the Laboratory and Brewing Strains of Saccharomyces cerevisiae* with DNA Microarray Applied Microbiology and Biotechnology, 70, 346-357 (2006) To construct yeast strains showing tolerance to high salt concentration stress, transcriptional response to high NaCl concentration stress in the yeast Saccharomyces cerevisiae was analyzed using DNA microarray and compared between two yeast strains, a laboratory strain and a brewing one, which is known as a stress-tolerant strain. Our selection of candidate genes for creation of stress tolerant yeast strains based on the transcriptome data was experimentally validated by overexpression of the candidate genes.

65	Shiraishi, Y. 1,2; Saito, N. 2; Hirai, T. 1,2 1 (Research Center for Solar Energy Chemistry) *2 (Graduate School of Engineering Science) Titanosilicate Molecular Sieve for Size-Screening Photocatalytic Conversion Journal of the American Chemical Society, 127, 8304-8306 (2005) Titanosilicate molecular sieves, when activated by ultraviolet light irradiation in water with molecular oxygen, catalyze a selective conversion of molecules having a size close to the pore of the catalysts. This unprecedented activity is triggered by a combination of H ₂ O-induced shortened lifetime of active species and restricted diffusion of a molecule inside the pore. This property demonstrates a potential utility of the catalyst for selective transformation of molecules that is associated with a molecular size reduction, labeled as “molecular shave” transformation.

66	Sugahara, T. ; Murayama, S.; Hashimoto, S.; Ohgaki, K. (Graduate School of Engineering Science) Phase Equilibria for H ₂ + CO ₂ + H ₂ O System Containing Gas Hydrates Fluid Phase Equilibria, 233, 190-193 (2005) Isothermal phase equilibria for the ternary system of H ₂ +CO ₂ +H ₂ O in the presence of gas hydrate phase have been investigated as the fundamental study of H ₂ separation using gas hydrates at high pressures. Both the thermodynamic analysis and the Raman spectra suggest that H ₂ is not enclathrated in the hydrate-cages and behaves only like the diluent gas toward the formation of CO ₂ hydrate. This result indicates that H ₂ separation using gas hydrates is feasible in thermodynamics.

67	Tsukuda, S. ; Seki, S.; Tagawa, S. .; Sugimoto, M. (Institute of Scientific and Industrial Research) Effect of Ion Beam Energy and Polymer Weight on the Thickness of Nanowires Produced by Ion Bombardment of Polystyrene Thin Films Applied Physics Letters, 87, 233119 (2005)

68	Mizuno, E.; Taniguchi, M. ; Kawai, T. (Institute of Scientific and Industrial Research) Ambipolar Organic Field-effect Transistor Using Gate Insulator Hysteresis Applied Physics Letters, 86, 143513-143515 (2005) The polarity inversion phenomena induced by the electric field-effect at the gate insulator is extremely important to material science and could have a major impact on organic field effect transistors that are currently being extensively studied throughout the world. We found that we could induce charge at the interlayer in an effective manner by exploiting the ferroelectricity of the polymer insulating layer, and accordingly succeeded in the realization of polarity inversion in an organic field effect transistor based on copper-phthalocyanine.

69	Takahashi, K.; Tonouchi, M. (Institute of Laser Engineering) Terahertz Radiation by an Ultrafast Spontaneous Polarization Modulation of Multiferroic BiFeO ₃ Thin Films Physical Review Letters, 96, 117402/1-4 (2006)

70	Huang, X.; Hansen, N.; Tsuji, N.. (Graduate School of Engineering) Hardening by Annealing and Softening by Deformation in Nanostructured Metals Science, 312, 249-251 (2006)

71	Tanaka, S.; Nishiyama, N.; Egashira, Y.; Ueyama, K. (Graduate School of Engineering Science) Synthesis of Ordered Mesoporous Carbons with Channel Structure from an Organic-Organic Nanocomposite Chemical Communications, 2125-2127 (2005)

72	Wada, Y. ; Sato, M.; Tsukahara, Y. (Graduate School of Engineering) Fine Control of Red-Green-Blue Photoluminescence in Zeolites with Incorporated with Rare-Earth Ions and a Photosensitizer Angewandte Chemie International Edition, 45, 1925-1928 (2006)

73	Leibnitz, K.; Wakamiya, N. ; Murata, M. (Graduate School of Information Science and Technology) Biologically Inspired Self-Adaptive Multi-Path Routing in Overlay Networks Communications of the ACM, 49, 63-67 (2006)

74	Nakatani, R. ; Yoshida, T.; Endo, Y.; Kawamura, Y.; Yamamoto, M. ; Takenaga, T.; Aya, S.; Kuroiwa, T.; Beysen, S.; Kobayashi, H. (Graduate School of Engineering) Magnetically Pinned Ring Dots for Spin-Valve or Magnetic Tunnel Junction Memory-Cells Journal of Magnetism and Magnetic Materials, 286, 31-36 (2005) Magnetic random access memory (MRAM) is promising memory device which is non-volatile and shows high-speed potential. We investigate Ni-Fe/Mn-Ir asymmetric ring dots for the future MRAMs. The ring dots can be arranged with ultra-high-density because the ring dots do not cause stray fields. Magnetic force microscopy reveals that the direction of vortical magnetization of Ni-Fe ring is pinned due to antiferromagnetic Mn-Ir ring. This paper demonstrates the first successful result of ring dots with pinned vortical magnetization in the world.

75	Kurosaki, K.; Kosuga, A.; Muta, H.; Uno, M.; Yamanaka, S. (Graduate School of Engineering) Ag ₉ TlTe ₅ : A High-Performance Thermoelectric Bulk Material with Extremely Low Thermal Conductivity Applied Physics Letters, 87, 061919/1-3 (2005)

76	Yasuda, H. 1; Nakajima, T. 2; Nakano, K. 2; Yamaoka, K. 2; Ueda, M. 2; Umakoshi, Y. 2. 1 (Research Center for Ultra-High Voltage Electron Microscopy) 2 (Graduate School of Engineering) Effect of Al Concentration on Pseudoelasticity in Fe ₃ Al Single Crystals Acta Materialia, 53, 5343-5351 (2005)

Backward

4 of 4

share !