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71.
Genki Odahara Shigeki Otani Chuhei Oshima Masahiko Suzuki Tsuneo Yasue Takanori Koshikawa 《Surface and interface analysis : SIA》2011,43(12):1491-1493
We observed in situ growth of a single graphene sheet on Ni(111) by low‐energy electron microscopy. The sheet was grown epitaxially beyond the steps on the substrate. The crystalline shapes of graphene islands were clearly seen; the straight edges of the island are crossed at either 60 or 120°, and the linear edges shifted perpendicular to the edge keeping the equilibrium shape. Graphene islands were united to form a single sheet without any grain boundaries and any wrinkles. The Ni substrate of several centimeters in size was covered with a single‐domain graphene sheet. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
72.
73.
Yong-Hoon Kim Md. Mashiur Rahman Zhen-Long Zhang Nobuo Misawa Ryugo Tero Tsuneo Urisu 《Chemical physics letters》2006,420(4-6):569-573
The effect of the electrostatic attractive force between giant unilamellar vesicles (GUVs) and the SiO2 surface on the formation of a Ca2+-free supported lipid bilayer (SLB) was investigated by atomic force microscopy and fluorescence microscopy. When negatively charged GUVs were incubated for 1 h without Ca2+, the surface coverage of lipid bilayer was <1% on the SiO2 surface. In contrast, a high coverage was obtained without addition of Ca2+ on the positively charged surface modified by aminopropyldimethylethoxysilane, and the coverage of SLBs decreased with increasing KCl concentrations. The thickness of the water layer under SLB was reduced by modification of APS. 相似文献
74.
Kazuhiko Mase Mitsuru Nagasono Shin-ichiro Tanaka Tsuneo Urisu Eiji Ikenaga Tetsuji Sekitani Ken-ichiro Tanaka 《Surface science》1997,390(1-3):97-101
Ion desorption induced by a resonant excitation of O 1s of condensed amorphous H2O has been studied by total ion and total electron yield spectroscopy, nonderivative Auger electron spectroscopy (AES) and Auger electron photo-ion coincidence (AEPICO) spectroscopy. The spectrum of total ion yield divided by total electron yield exhibits a characteristic threshold peak at hν = 533.4 eV, which is assigned to the 4a1 ← O 1s resonant transition. The AES at the 4a1 ← O 1s resonance is interpreted as being composed of the spectator-AES of the surface H2O, and the normal-AES of the bulk H2O, where the 4a1 electron is delocalized before Auger transitions. H+ is found to be the only ion species in AEPICO spectra measured at the 4a1 ← O 1s resonance and at the O 1s ionization (hν = 560 eV). The electron kinetic energy dependence of the AEPICO yield (AEPICO yield spectrum) at the 4a1 ← O 1s resonance is found to be greatly different from that at the O 1s ionization. The peak positions of the AEPICO yield spectrum at the 4a1 ← O 1s resonance are found to correspond to those of the spectator-AES of the surface H2O, which is extracted from the AES at the 4a1 ← O 1s resonance. Furthermore, the AEPICO yield is greatly enhanced at the 4a1 ← O 1s resonance as compared with that at the O 1s ionization. On the basis of these results, a spectator-Auger-stimulated ion desorption mechanism and/or ultra-fast ion desorption mechanism are concluded to be responsible for the H+ desorption at the 4a1 ← O 1s resonance. The enhancement of the H+ yield is ascribed to the O---H anti-bonding character of the 4a1 orbital. 相似文献
75.
76.
A family of formulae for the sympletic IRK method is investigated. Specifically, focus is given to general solutions for formula parameters of IRK under the symplectic and the order conditions. Examples of such formulae are constructed for up to three stages. 相似文献
77.
The emission produced by sulfite on oxidation by permanganate in acidic solution in the presence of riboflavin phosphate or brilliant sulfaflavine is used to determine 0.9–35 ng of sulfite. Only sulfide and thiosulfate also give emissions. 相似文献
78.
Racemic and optically active title compound was reduced with chiral and achiral NAD(P)H models. The composition of diastereomers in the product was determined and the steric relationship is discussed. 相似文献
79.
Base-catalyzed homo-brook rearrangement of diastereomeric 7,8- epoxy-7(trimethylsilyl)-6-tridecanols
Semi-quantitative rate measurement of base-catalyzed 1,3-migration of a silyl group from carbon to oxygen (homo-Brook rearrangement) using four diastereomerically pure title compounds revealed that the aptitude for the migration depends markedly on the configurational environment around the trimethylsilyl group of the respective substrate. 相似文献
80.
Tadahiro Kato Yoshihiro Yamaguchi Nobunori Abe Tadao Uyehara Tsuneo Namai Mitsuaki Kodama Yoshinori Shiobara 《Tetrahedron letters》1985,26(19):2357-2360
Structural elucidation including the absolute configuration was carried out on the trihydroxy C18 -fatty acids isolated from rice plant, Sasanishiki suffered from rice blast disease. 相似文献