表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
36 巻 , 9 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34回表面科学学術講演会特集号 [III]
  • 松尾 春佳, 角田 早, 蔡 徳七, 大山 浩, 中村 一平, 綱島 亮, 松本 卓也
    原稿種別: 論文
    2015 年 36 巻 9 号 p. 454-458
    発行日: 2015/09/10
    公開日: 2015/09/25
    ジャーナル フリー
    Polyoxometalates (POMs) are condensation products of transition metal oxyanions. POMs are expected as nanodevice because of its high redox potential and the semiconductive characteristics. Electric conductance of single {Mo154/152}-ring mixed-valence oxomolybdate giant cluster were investigated by conductive atomic force microscope. Conductance were obtained by point-contact during interruption of tapping-mode feedback under controlled loading force. The current-voltage curve arise at ±0.5 V suggesting electron tunneling between electrode and {Mo154/152}-ring molecular levels.
  • 藤田 大介
    原稿種別: 論文
    2015 年 36 巻 9 号 p. 459-464
    発行日: 2015/09/10
    公開日: 2015/09/25
    ジャーナル フリー
    In situ nanocharacterization of decomposition process of SiO2 films on Si(111) using high temperature scanning probe microscopy and scanning Auger microscopy in ultrahigh vacuum is reported. Due to insulating behavior of SiO2, noncontact atomic force microscopy (NC-AFM) was employed at ∼950 K in ∼10−8 Pa. Using conductive needle-sensors, simultaneous imaging of conductivity and topography was performed. NC-AFM enabled clarifying initial stage of void formation, where Si(111)-7×7 surfaces were confirmed by atomic-resolution scanning tunneling microscopy. Cross-sectional profiles showed layer-by-layer etching as well as nucleation and growth of Si precipitates. Observed process are explained as follows. Firstly Si monomers are formed from surface lattice. The Si monomers diffuse to SiO2 films and react with oxygen atoms. The formed SiOx can desorb as SiO gas. Simultaneously Si monomers can recombine and nucleate as nanoscale Si precipitates. This is the first in situ observation of competitive reaction process of SiO2 decomposition, Si etching and precipitation.
  • 増田 卓也, 魚崎 浩平
    原稿種別: 研究紹介
    2015 年 36 巻 9 号 p. 465-473
    発行日: 2015/09/10
    公開日: 2015/09/25
    ジャーナル フリー
    Potential dependent adsorption/desorption behavior of Nafion on Au and Pt surfaces was investigated by cyclic voltammetry, quartz crystal microbalance (QCM) and atomic force microscopy (AFM) in a Nafion dispersed aqueous solution without any other electrolyte. In the case of Au, Nafion adsorbed on the surface with lying down configuration at 0.45 V versus Ag/AgCl, the adsorbed amount increased when the potential was made more positive than 0.75 V, and adsorbed Nafion desorbed from the surface upon the Au oxide formation. Once the Au oxide was reduced, Nafion re-adsorbed on the surface. In the case of Pt, Nafion adsorbed on the surface in the potential region between 0.1 and 0.8 V without any significant structural change induced by the potential sweeping. Nafion desorbed from the surface when the place-exchanged Pt oxide was formed. Once the Pt oxide was reduced, Nafion re-adsorbed on the surface. These processes took place reversibly.
  • 武田 さくら, 久米田 晴香, 前田 昂平, 桃野 浩樹, 中尾 敏臣, 竹内 克行, アルトニ アン, 坂田 智裕, 大門 寛
    原稿種別: 研究紹介
    2015 年 36 巻 9 号 p. 474-479
    発行日: 2015/09/10
    公開日: 2015/09/25
    ジャーナル フリー
    We have developed a high resolution Raman system attached to an UHV chamber equipped with angle-resolved photoelectron spectroscopy and a manipulator which can apply mechanical strain to sample. The whole system is suitable to evaluate the strain effect on electronic structure. In this paper, we introduce the detail of the system and Raman data of Graphene, sSOI and uniaxially strained Si obtained through the system.
  • 磯田 盛夫, 早水 裕平
    原稿種別: 研究紹介
    2015 年 36 巻 9 号 p. 480-485
    発行日: 2015/09/10
    公開日: 2015/09/25
    ジャーナル フリー
    Protein adsorption on solid surfaces has been gaining wide interests in the fields of drag delivery, biosensor, and biomedical diagnosis. Peptides, small proteins, also bind to solid surfaces. Recently, there are a variety of peptides have been developed and reported which show not only a binding affinity on solid surfaces but also spontaneous organizing into long-range ordered structures on surfaces. We investigate the thermal stability of self-assembled peptides on graphite. We utilized graphite binding peptide 5 (GrBP5), which is selected by phage display method. Using atomic force microscopy, we characterized the morphology of peptide nanostructures at various temperatures. GrBP5 assembled into two phases with six-fold symmetry, resulting in phase transition over time. Upon the temperature control, kinetics of the phase transition was studied to evaluate the thermodynamic stability of each phase of the self-assembled peptides.
連載企画
環境問題と表面科学
談話室
海外研究体験記
開催報告
先端追跡
訃報
feedback
Top