Sum-frequency generation analyses of the structure of water at amphoteric SAM-liquid water interfaces

Kouji Nomura, Tadashi Nakaji-Hirabayashi, Makoto Gemmei-Ide, Hiromi Kitano*, Hidenori Noguchi, Kohei Uosaki

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

12 被引用数 (Scopus)

抄録

Surfaces of both a cover glass and the flat plane of a semi-cylindrical quartz prism were modified with a mixture of positively and negatively charged silane coupling reagents (3-aminopropyltriethoxysilane (APTES) and 3-(trihydroxysilyl)propylmethylphosphonate (THPMP), respectively). The glass surface modified with a self-assembled monolayer (SAM) prepared at a mixing ratio of APTES:THPMP=4:6 was electrically almost neutral and was resistant to non-specific adsorption of proteins, whereas fibroblasts gradually adhered to an amphoteric (mixed) SAM surface probably due to its stiffness, though the number of adhered cells was relatively small. Sum frequency generation (SFG) spectra indicated that total intensity of the OH stretching region (3000-3600cm-1) for the amphoteric SAM-modified quartz immersed in liquid water was smaller than those for the positively and negatively charged SAM-modified quartz prisms and a bare quartz prism in contact with liquid water. These results suggested that water molecules at the interface of water and an amphoteric SAM-modified quartz prism are not strongly oriented in comparison with those at the interface of a lopsidedly charged SAM-modified quartz prism and bare quartz. The importance of charge neutralization for the anti-biofouling properties of solid materials was strongly suggested.

本文言語英語
ページ(範囲)264-269
ページ数6
ジャーナルColloids and Surfaces B: Biointerfaces
121
DOI
出版ステータス出版済み - 2014/09/01

ASJC Scopus 主題領域

  • バイオテクノロジー
  • 表面および界面
  • 物理化学および理論化学
  • コロイド化学および表面化学

フィンガープリント

「Sum-frequency generation analyses of the structure of water at amphoteric SAM-liquid water interfaces」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル