Structure investigation of metal ions clustering in dehydrated gel using X-ray anomalous dispersion effect

Yuji Soejima, Shuichiro Kuwajima, Masaaki Sugiyama, Masahiko Annaka, Atsushi Nakamura, Nobuyasu Hiramatsu, Kazuhiro Hara

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)


The structure of copper ion clusters in dehydrated N-isopropylacrylamide/ sodium acrylate (NIPA/SA) gel has been studied by means of small angle X-ray scattering (SAXS) method. In order to distinguish the intensity scattered by Cu ions, the X-ray anomalous dispersion effect around the Cu K absorption edge has been coupled with SAXS. It is found that the dispersion effect dependent on the incident X-ray energy is remarkable only at the momentum transfer q = 0.031 Å-1, where a SAXS peak is observed. The results indicate that copper ions form clusters in the dehydrated gel, and that the mean size of clusters is the same as that of SA clusters produced by microphase separation. It is therefore naturally presumed that copper ions are adsorbed into the SA molecules. On the basis of the presumption, a mechanism is proposed for microphase-separation and clustering of Cu ions.

ジャーナルjournal of the physical society of japan
出版物ステータス出版済み - 8 1 2003


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)