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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2110-2113
Number of pages4
Journaljournal of the physical society of japan
Volume72
Issue number8
DOIs
Publication statusPublished - Aug 1 2003

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metal ions
gels
ions
x rays
copper
scattering
acrylates
momentum transfer
sodium
molecules
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Structure investigation of metal ions clustering in dehydrated gel using X-ray anomalous dispersion effect. / Soejima, Yuji; Kuwajima, Shuichiro; Sugiyama, Masaaki; Annaka, Masahiko; Nakamura, Atsushi; Hiramatsu, Nobuyasu; Hara, Kazuhiro.

In: journal of the physical society of japan, Vol. 72, No. 8, 01.08.2003, p. 2110-2113.

Research output: Contribution to journalArticle

Soejima, Yuji ; Kuwajima, Shuichiro ; Sugiyama, Masaaki ; Annaka, Masahiko ; Nakamura, Atsushi ; Hiramatsu, Nobuyasu ; Hara, Kazuhiro. / Structure investigation of metal ions clustering in dehydrated gel using X-ray anomalous dispersion effect. In: journal of the physical society of japan. 2003 ; Vol. 72, No. 8. pp. 2110-2113.
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AU - Nakamura, Atsushi

AU - Hiramatsu, Nobuyasu

AU - Hara, Kazuhiro

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AB - 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.

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