Liesegang pattern formation in κ-carrageenan gel

Takayuki Narita, Masayuki Tokita

研究成果: Contribution to journalArticle査読

24 被引用数 (Scopus)

抄録

We report a new class of the spatial pattern formation process in which the gel plays essential roles. The system studied here is the solution of κ-carrageenan in which potassium chloride is diffused. The solution transforms into the gel state with the diffusion of potassium chloride. Then the stripe pattern, which is perpendicular to the direction of the diffusion of potassium chloride, appears within the gel. The pattern thus formed in the gel is studied as a function of the concentration of the solution of potassium chloride. We find that the dense region of the stripe pattern consists of the liquid crystalline gel, whereas the dilute region is the amorphous gel. The transition from the amorphous gel to the liquid crystalline gel, hence, occurs in the gel state of κ-carrageenan. The gel behaves as a pattern-forming substance as well as the supporting medium of the pattern in this system. The period and the thickness of the layers of liquid crystalline gel are analyzed. Both the period and the thickness of the layers are found to depend strongly on the concentration of the solution of potassium chloride.

本文言語英語
ページ(範囲)349-352
ページ数4
ジャーナルLangmuir
22
1
DOI
出版ステータス出版済み - 1 3 2006

All Science Journal Classification (ASJC) codes

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

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