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: Contribution to journalArticle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 18 2003

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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