表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
37 巻 , 10 号
選択された号の論文の14件中1~14を表示しています
巻頭言
特集: 走査型プローブ顕微鏡を用いた電極表面科学
  • 近藤 敏啓
    原稿種別: 企画趣旨
    2016 年 37 巻 10 号 p. 474
    発行日: 2016/10/10
    公開日: 2016/10/25
    ジャーナル フリー
    Since the scanning tunneling microscope (STM), which is one of the scanning probe microscope (SPM), was invented by Drs. Binnig and Rohrer, more than 30 years have passed. Because SPM can be used not only in a vacuum but also even in a solution, this invention has greatly contributed to the development of electrochemistry research. I was asked to top researchers in each field as a chairman of the electrode surface science research branch, in this time, to describe in this special issue about the progress and current status of the electrode surface science using the SPM.
  • 山田 啓文
    原稿種別: 研究紹介
    2016 年 37 巻 10 号 p. 475-481
    発行日: 2016/10/10
    公開日: 2016/10/25
    ジャーナル フリー

    Surface charges on nanometer-scale structures in liquids play an essentially important role in various physical, chemical and biochemical phenomena such as ionic adsorptions, microscopic electrode reactions and specific ligand bindings. These molecular-scale interactions are mediated through local electric double layers (EDLs) formed by the counter ions in electrolyte solution. Although static-mode atomic force microscopy (AFM) including colloidal probe AFM is a powerful technique for surface charge density measurements and EDL analysis on a submicron scale in liquids, precise surface charge density analysis with molecular resolution has not been realized because of its limitation of the resolution and the electrical force detection sensitivity. Here recent molecular-scale surface charge measurements of self-assembled micellar structures and biomolecules by three-dimensional (3D) force mapping based on frequency modulation AFM are presented.

  • 吉本 惣一郎
    原稿種別: 研究紹介
    2016 年 37 巻 10 号 p. 482-487
    発行日: 2016/10/10
    公開日: 2016/10/25
    ジャーナル フリー

    Design and control of functionalized surfaces play an important role in the formation of two-dimensional highly ordered and stable monomolecular adlayers, and the connection of various organic and/or organometallic components in nanotechnology applications. Electrochemical scanning tunneling microscopy (EC-STM) have been widely recognized as a powerful technique for in situ characterization with atomic and/or molecular resolution under potential control. In this article, several selected topics are focused on, bisterpyridine derivative and metal ion coadsorption, molecular assembly and ligand exchange reaction due to the redox reaction in the diruthenium complex, and a self-assembled monolayer composed of pyridine-terminated thiol. From the standpoint of molecular assembly related to electrochemistry and coordination chemistry, molecular adlayer structures and dynamics such as phase transition are reported.

  • 福井 賢一
    原稿種別: 研究紹介
    2016 年 37 巻 10 号 p. 488-493
    発行日: 2016/10/10
    公開日: 2016/10/25
    ジャーナル フリー

    An electric double layer (EDL) formed at an electrolyte/electrode interface provides a steep potential slope which facilitates electrochemical reactions at the interface. This review paper summarizes recent our study on the structuring of liquid phase molecules at some electrolyte/electrode interfaces investigated using electrochemical frequency modulation AFM (EC-FM-AFM), which we developed to analyze such interfaces under electrode potential control for local information of the liquid side as well as atomic scale imaging of the solid side. It was found that the rigidness of the hydration layer at an aqueous electrolyte/graphite electrode interface was greatly affected by electrochemical potential and kinds of the electrolyte, which also affected the organization of adsorbed molecules at the interface. It was revealed that ionic liquids, promising electrolytes for electrochemical devices, showed different degree of structuring at the interfaces strongly dependent on the electrode materials. Such experimental results were supported by molecular dynamics (MD) calculations.

  • 熊谷 明哉, 高橋 康史, 三浦 千穂, 渡邊 徹弥, 猪又 宏貴, 棟方 裕一, 珠玖 仁, 金村 聖志, 末永 智一
    原稿種別: 研究紹介
    2016 年 37 巻 10 号 p. 494-498
    発行日: 2016/10/10
    公開日: 2016/10/25
    ジャーナル フリー

    Scanning electrochemical cell microscopy with a single barrel nanopipette (nanoSECCM), which is one of scanning electrochemical microscope (SECM) families, is a powerful tool for analyzing electrochemical activities (e.g. redox reaction and lithium-ion (de) intercalation processes) at localized area. A glass nano-pipette is used as a probe of nanoSECCM filled with electrolyte and a reference electrode. As the pipette is in proximity of sample surface, a meniscus is created. Through the meniscus, electrochemical activities can be obtained at localized area on the sample. Further, as the pipette scans the sample surface, electrochemical activities can be also visualized. Our experiments demonstrate that nanoSECCM is applicable to investigation of current response related to lithium-ion transport, redox cycling on various types of electrodes.

  • 犬飼 潤治
    原稿種別: 研究紹介
    2016 年 37 巻 10 号 p. 499-503
    発行日: 2016/10/10
    公開日: 2016/10/25
    ジャーナル フリー

    Current-sensing atomic force microscopy (CS-AFM) was applied to the analysis of surface morphology/conductivity of the membranes used for polymer electrolyte fuel cells (PEFCs). Nano-scale images of surface structures and protonconductive paths were simultaneously obtained under the conditions similar to those for the power generation. The “conditioning” processes enhancing the performances of PEFCs were examined by CS-AFM. Effects of the high protonic currents through the membrane and hot-water pretreatment were investigated in detail on the power generation of PEFCs with hydrocarbon electrolyte membranes.

研究紹介
連載企画
安全な社会と表面科学
  • 保坂 三継
    2016 年 37 巻 10 号 p. 510-512
    発行日: 2016/10/10
    公開日: 2016/10/25
    ジャーナル フリー

    バイオフィルムとは,細菌によって器物表面に形成される膜状の付着物で,浴室や台所等の水回りにできるヌメリもそのひとつである。大規模なものでは,循環式浴槽や空調用冷却塔など,温水を繰り返し使用する施設・設備を広く汚染する。バイオフィルムの内部には,各種の細菌や真菌類,原生動物など様々な微生物が生息する。この中に,もともとは土壌細菌と考えられているレジオネラ属菌が繁殖し,バイオフィルムの形成された水から発生したエアロゾルを吸引した人の肺に感染し,レジオネラ症等の健康被害を引き起こす場合がある。レジオネラ属菌に汚染された冷却塔水や循環式浴槽水が原因となって,大規模な集団感染が度々発生している。その対策として,バイオフィルムが出来にくい素材の検討や適切な維持管理によるバイオフィルムとレジオネラの繁殖制御,そして効果的な消毒等が必要である。くらしの中に潜む健康リスクとしてのレジオネラ属菌が引き起こす感染を防止するため,身近な水回りのバイオフィルムの制御が求められる。

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