表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
18 巻 , 6 号
選択された号の論文の8件中1~8を表示しています
  • 安藤 寿浩, 相澤 俊, 蒲生西谷 美香, 坂口 勲, 羅 健平, 佐藤 洋一郎
    1997 年 18 巻 6 号 p. 332-341
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    Surface vibrational spectroscopies provides us the useful information on chemisorption states on diamond surfaces. We have investigated hydrogen and oxygen chemisorption states on diamond surfaces by two different vibrational spectroscopies; (i) Fourier-transform Infrared (FTIR) and (ii) High-resolution Electron Energy Loss Spectroscopy (HREELS). Diffuse reflectance FTIR is effective for powder diamond samples with large surface areas. Diffuse reflectance FTIR clarified detailed chemisorption structures of hydrogen and oxygen on powdered polycrystalline diamond surfaces. H-D exchange reaction and oxidation on diamond surfaces were conducted in reactant gas environments by the diffuse reflectance FTIR. HREELS is a powerful technique to observe the species on single crystal diamond surfaces with small surface areas. HREELS revealed a characteristic feature of hydrogen chemisorption on (100) and (111) diamond surfaces. In this review, we report the two different vibrational spectroscopies as techniques to study diamond surface reactions and their mechanisms.
  • 築野 孝, 熊澤 佳明
    1997 年 18 巻 6 号 p. 342-347
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    Surface observation by scanning tunneling microscopy and electron diffraction is capable of providing atomic order information for diamond homoepitaxial films grown by chemical vapor deposition. For diamond {001} homoepitaxial films, a 2×1 structure was mainly observed. The structure suggests growth via dimer row extension. For diamond {111} films, 1×1 periodicity and a local √3×√3 structure were observed. The formation of spiral steps suggests Frank-type growth due to screw dislocation.
  • 三宅 正二郎
    1997 年 18 巻 6 号 p. 348-355
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    Tribology is a key technology for the use of modern mechanical-elements in the advanced industry, because atomic-scale wear and friction fluctuations degrade equipment performances. New hard, lubricating coatings such as diamond seem to be useful in reducing the wear and friction fluctuations. This paper discusses some tribological properties of diamond that reduces friction and atomic-scale wear (“achieving micro-tribological zero-wear”). Water boundary lubrication of diamond realizes extremely low friction. Fluorination of diamond decreases the surface energy and micro-friction force. As wear properties, diamond has excellent wear resistance and low damage formation on opposite surface due to low friction properties. Potential application of these new diamond coatings to modern tribo-elements used in the advanced industry such as magnetic head-disk interface, LSI manufacturing systems, and micromachines and others are discussed.
  • 八田 章光, 伊藤 利道, 平木 昭夫
    1997 年 18 巻 6 号 p. 356-361
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    Chemical vapor deposited diamond films attract a great deal of interest for application to the future electronics. Recent progress in heteroepitaxial growth of diamond films on Si, SiC, or Pt substrates will realize single crystalline diamond substrates of large wafer size. One of most enthusiastic application area of diamond films is the electron emitter for the flat display panel or microvacuum electronics because of its unique property of negative electron affinity surface. An electron emitter of diamond thin film was designed using metal-insulator-semiconductor diode structure. The fabricated emitter performed electron emission only by the forward biasing to the diode.
  • 西原 孝義, 一戸 裕司, 工藤 正博, 星 孝弘, 遠藤 一央
    1997 年 18 巻 6 号 p. 362-366
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    Damages caused by ion beam irradiation during S-SIMS measurements of polymer samples such as polytetrafiuoroethylene (TEFLON), polyethyleneterephthalate (PET) and polycaprolactam (NYLON6) were investigated by using TOF-SIMS, QSIMS and XPS. Intensity changes of each secondary ion species vs. ion dosage were analyzed from the view point of chemical structures of the samples. Changes of surface chemical structures due to ion bombardments were also investigated via curve fitting and quantification of the observed XPS spectra. The results were discussed with the aid of semiempirical MO calculations, which proved to be useful for the qualitative interpretation of the chemical state change analyzed by XPS and the origin of the major peaks in the S-SIMS spectra.
  • 岡本 昌幸, 儘田 明, 内藤 宏一, 後藤 伸也, 若狭 正信, 脇阪 達司
    1997 年 18 巻 6 号 p. 367-372
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    In order to understand the mechanism of internal surfactants as anti-static agents on polymer surfaces, surface specific resistivity measurement and secondary ion mass spectroscopy (SIMS) were used for characterization of an anti-static agent containing alkylamine surfactant (DEA) in polypropylene (PP) sheet. In this study, deuterium-labeled DEA was used as a model compound and secondary ions emitted from the labeled isotope were detected. We showed the depth profile and imaging of the DEA on the PP surface. We clarified the anti-static mechanism, and concluded that adding alcohol to the antistatic agents accelerates the ooze and diffusion of DEA, resulting in a high anti-static effect on the PP surface.
  • 大野 公隆, Larry Akio NAGAHARA, 果 尚志, 水谷 亘, 徳本 洋志
    1997 年 18 巻 6 号 p. 373-379
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    Self-assembled monolayer(SAM)s of 1-octadecanethiol [ODT: CH3(CH2)17SH] were formed on bare GaAs substrates by cleaving the substrates in a 1 mM ethanol. Both growth process and surface properties were investigated using surface force microscopy (SFM) and x-ray photoelectron spectroscopy (XPS). Dendritic shape of islands ∼20 nm in diameter appeared for 30 sec immersion. As the immersion time increased, these islands coalesced, connected each other, and finally the surfaces were uniformly covered with the monolayer after 1 day of immersion. High-resolution friction force microscope (FFM) images revealed a periodic structure that had two type of lines on the SAM. A structural model of the SAM, which successfully explained these experimental results, was presented. XPS results also indicated that SAM of ODT can protect a GaAs surface from oxidation. Furthermore, we demonstrated the formation of nanostructural SAM of ODT by use of A1GaAs/GaAs hetero-epitaxial substrates. SFM images revealed that ODT molecules selectively chemisorbed on GaAs surface regions resulting in the formation of nano-wires, 10 nm in width and ∼1 nm in height. The mechanism of the nanostructural SAM formation was also discussed.
  • 石田 信伍, 高橋 秀典
    1997 年 18 巻 6 号 p. 380-384
    発行日: 1997/06/10
    公開日: 2009/08/07
    ジャーナル フリー
    This article deals mainly with the colors of celadon and copper red glazes, and ceramic pigments in terms of their color development mechanisms. Firing atmospheres (oxidizing, neutral, reducing) applied during heating and cooling processes and the onset temperatures of their applications are important factors to produce desired glaze colors. Furthermore, methods for modifying colors of ceramic pigments are briefly mentioned.
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