固液界面における陽イオン両親媒性分子集合体のAFMによる力学的測定 Mechanical Properties of Molecular Assemblies of Cationic Amphiphiles Adsorbed at Solid/Liquid Interfaces

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著者

    • 最上 理映 MOGAMI Rie
    • 東京都立大学大学院理学研究科化学専攻 Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University
    • 藤井 政俊 FUJII Masatoshi
    • 東京都立大学大学院理学研究科化学専攻 Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University
    • 加藤 直 KATO Tadashi
    • 東京都立大学大学院理学研究科化学専攻 Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University

抄録

The aggregates properties of amphipathic molecules formed at solid-liquid interfaces are influenced by the environmental conditions: solution concentration, temperature, kind of counterion, etc. The effect of the counterions on the adsorbed aggregates was investigated by atomic force microscopy in surface force mode and in surface imaging mode for alkyltrimethylammonium salts (hexadecyltrimethylammonium bromide; CTABr, hexadecyltrimethylammonium chloride; CTACl) at silica-aqueous solution interfaces. The surface force data was analyzed by using DLVO theory. The aggregate of CTABr had smaller surface potential than that of CTACl, and thus, the dissociation degree for CTABr aggregate was lower than that for CTACl. The collapse pressure for CTABr aggregate was smaller than that for CTACl. Although adsorbed aggregates with circular projections were observed for both CTABr and CTACl, the diameter of the circles for CTABr was greater than that for CTACl. Therefore, the aggregates of CTABr on the surface were softer and larger than those of CTACl. It will be considered that the aggregates of CTABr and CTACl were formed with a hemimicelle adsorbed on a flat monolayer and an admicelle on a solid surface, respectively.

収録刊行物

  • 表面科学 = Journal of The Surface Science Society of Japan

    表面科学 = Journal of The Surface Science Society of Japan 25(7), 422-427, 2004-07-10

    The Surface Science Society of Japan

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各種コード

  • NII論文ID(NAID)
    10013275295
  • NII書誌ID(NCID)
    AN00334149
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03885321
  • NDL 記事登録ID
    7028330
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z15-379
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    CJP書誌  NDL  J-STAGE 
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