表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
32 巻 , 11 号
選択された号の論文の13件中1~13を表示しています
巻頭言
特集:燃料電池触媒と表面科学
論文
  • 小山 健
    原稿種別: 論文
    2011 年 32 巻 11 号 p. 723-726
    発行日: 2011/11/10
    公開日: 2011/11/15
    ジャーナル フリー
    In this paper, we tried to evaluate the contact angle for a droplet on the solid surface with ruggedness based on elasticity theory and thermodynamics. In this theory, we assumed that the solid was homogeneous isotropic elastic body. Surface tension was given as function of strain in the imaginary layer which had thin finite thickness τ. By using this function and thermodynamics, cosine of the contact angle of a droplet was given as the function of volume fraction of solid in this imaginary layer. Ando, etc. had announced the experimental data for the porous silicon surface fabricated by anodic etching. For the purpose to confirm the validity of this theory, we compared these experimental data with theoretical calculated data. The theoretical calculated data showed comparatively good agreement with experimental data.
  • 中田 武志, 楊 菲, 吉田 晃人, 立間 徹, 玉田 薫
    原稿種別: 論文
    2011 年 32 巻 11 号 p. 727-732
    発行日: 2011/11/10
    公開日: 2011/11/15
    ジャーナル フリー
    Remote photocatalytic reaction of a Pt-modified TiO2 thin film was investigated by using Ag nanosheet as a marker. The Ag nanosheet is a two-dimensional crystalline film composed of myristate-capped silver nanoparticles (d = 5 nm), which has a strong localized plasmon absorption band at λmax = 470 nm. The Ag nanosheet on a 50 nm gold film was set on a measurement cell at 10 μm distance from the Pt-modified TiO2 film. Then the refractive index change of Ag nanosheet was real-time monitored by a surface plasmon resonance (SPR) technique under UV light irradiation (wavelength: 365 nm) from the back side of the TiO2 film. The plasmon resonance angle shifted to lower angle in consequence of the degradation of Ag nanosheet due to the remote photocatalytic reaction. We found the reaction was continued even after stopping UV irradiation, i.e., a chain reaction in Ag nanosheet was suggested. The chain reaction was influenced by N2 gas purge as well as the ligand exchange of myristate capping molecules to alkyl thiolate.
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