Aggregation states and molecular motion in amphiphilic poly(amido amine) dendrimer monolayers on solid substrates

Keiji Tanaka, Shiyu Dai, Tisato Kajiyama, Keigo Aoi, Masahiko Okada

    研究成果: ジャーナルへの寄稿学術誌査読

    25 被引用数 (Scopus)

    抄録

    Monolayers of third-generation amphiphilic poly(amido amine) (PAMAM) dendrimer were prepared at the air/water interface and then were successfully transferred onto silicon wafers by a horizontal lifting method. A comprehensive characterization of the PAMAM monolayers was made, structurally and dynamically, by scanning force microscopy in conjunction with X-ray reflectivity and X-ray photoelectron spectroscopy. The PAMAM molecules sit on the substrate with an oblate shape, in which hydrophilic core and hydrophobic alkyl end groups were toward substrate and air sides, respectively. In the PAMAM monolayers, distinct three, αa-, αH(2)O- and δ-, relaxation processes were observed on lateral force-temperature curves. They were assigned to segmental motion, plasticized segmental motion by residual water molecules, and a local mode relaxation, respectively.

    本文言語英語
    ページ(範囲)1196-1202
    ページ数7
    ジャーナルLangmuir
    19
    4
    DOI
    出版ステータス出版済み - 2月 18 2003

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学一般
    • 凝縮系物理学
    • 表面および界面
    • 分光学
    • 電気化学

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