表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
21 巻 , 7 号
選択された号の論文の12件中1~12を表示しています
巻頭言
第19回表面科学講演大会論文特集 [I]
論文
  • 小野寺 理, 坂口 浩司, 下山 雄平
    2000 年 21 巻 7 号 p. 392-397
    発行日: 2000年
    公開日: 2007/04/06
    ジャーナル フリー
    In order to reveal the formation process of a self-assembled monolayer (SAM) of poly-alkylthiophene, a poly-dodecylthiophene film on a gold substrate was analyzed by Fourier-transform infrared spectroscopy. We found that poly-dodecylthiophene successfully formed a SAM on the gold (111) surface. There are two stages for the SAM formation. In the first stage, dodecylthiophene adsorbs continuously on the substrate with the perpendicular orientation until the full coverage is attained. In the second stage, however, the alkyl-chain moiety aligns up to the parallel direction to the substrate surface. Our results indicate that the intramolecular tilt plays a crucial role for the orientation of the thiophene moiety, whereas the intermolecular interaction for the cooperative alkyl-chain alignment.
  • 小林 正, 久保 理, 原田 徹, 柳 正鐸, 片山 光浩, 尾浦 憲治郎
    2000 年 21 巻 7 号 p. 398-404
    発行日: 2000年
    公開日: 2007/04/06
    ジャーナル フリー
    Using scanning tunneling microscopy (STM) the atomic H adsorption on a Ag covered 6H-SiC(0001) surface was investigated. Ag deposition onto the 6H-SiC(0001)√3×√3 surface held at 500oC resulted in the formation of 3×3-Ag and 2D-island regions. STM images of the 3×3-Ag surface revealed one round protrusion per 3×3 unit cell at the empty state, while the protrusion showed a trimer like appearance at the filled state. As a result of atomic H adsorption at 300oC 2D layer of Ag was changed to 3D Ag clusters. Annealing of this surface at 500oC produced again 3×3-Ag and 2D-islands. However, the structures disappeared and the original √3×√3 surface was recovered by further annealing at 600oC. Thus, the reversible transformation from metal 2D layer to 3D clusters induced by atomic H adsorption was directly observed and evidenced in the case of SiC.
  • 久保 利隆, 野副 尚一
    2000 年 21 巻 7 号 p. 405-412
    発行日: 2000年
    公開日: 2007/04/06
    ジャーナル フリー
    The surface morphology of very thin titanium oxide films grown on MgO(100) was studied by use of non-contact atomic force microscopy (AFM). When Ti was deposited, in an O2 atmosphere of 2.6×10-6 Pa, on MgO(100) maintained at 600oC, rectangular structures of spinel nano-crystals were observed. Solid state reactions simultaneously occur during film deposition. When the surface was heated at 900oC in an O2 atmosphere of 2.6×10-6 Pa, a long range stripe structure was observed. The structure is related to the modulated structure characteristics of the Mg2TiO4(100) surface. A titanium oxide-MgO interfacial reaction proceeded by prolonged annealing. The stripe structure disappeared and atomically flat terraces with a step height of 0.2 nm were observed.
  • 中山 健太郎, 小西 健久, 藤川 高志, Peter RENNERT
    2000 年 21 巻 7 号 p. 413-419
    発行日: 2000年
    公開日: 2007/04/06
    ジャーナル フリー
    In theoretical calculation of ARXPS spectra, the plane wave Debye-Waller factor has been mostly used. However, recent theoretical researches have shown the importance of spherical wave Debye-Waller factor in ARXPS spectra. We calculated Ge 3 p ARXPS spectra of Ge(111) surface and studied the effects of the spherical wave Debye-Waller factor. The calculation using the spherical wave Debye-Waller factor explains temperature dependence of the ARXPS spectra. In particular, the spherical wave Debye-Waller factor explains the observed decrease of forward scattering intensity with increasing of temperature below the bulk melting temperature, where the plane wave approximation for the Debye-Waller factor fails to describe this phenomenon. We also estimated the mean square relative displacement around the temperature of high-temperature surface phase transition.
  • 酒井 英樹
    2000 年 21 巻 7 号 p. 420-425
    発行日: 2000年
    公開日: 2007/04/06
    ジャーナル フリー
    A method for investigating the acid-base properties of solid surfaces using a small drop of unbuffered solution has been developed. When the aqueous solution comes into contact with a solid having ionizable functional groups on it, hydrogen ions are transferred between the solid and the solution via acid-base reactions. If the solution is a small drop of unbuffered one, it causes pH variation because of the change in the hydrogen ion concentration. The number of transferred hydrogen ions at a certain value of solution pH depends on the acid-base properties of the functional groups. Therefore, by measuring the pH variation of a small fixed-volume drop of unbuffered solution in contact with solids, it will be possible to determine the acid-base properties of solid surfaces.
  • 湊 龍一郎, 江口 豊明, 古田 俊一, 三浦 義弘, 加藤 良造, 森田 英之, 船木 貴博, 佐藤 宏, 大坂 敏明
    2000 年 21 巻 7 号 p. 426-433
    発行日: 2000年
    公開日: 2007/04/06
    ジャーナル フリー
    XPS spectra associated with surface core-level shifts (SCLS) for the InSb{111}A, B-(2×2) surfaces are fitted with the curves represented by the Voigt function. While testing as to how the Voigt function changes with detection angle, the Lorentzian width included in the function remains almost unchanged, whereas the Gaussian width becomes broadened with an increase in detection angle. This Voigt function allows to decompose a spectrum of interest into bulk and SCLS component with sufficient intensity, realizing quantitative estimation for the SCLS intensity.
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