Experimental demonstration for the morphological evolution of crystals grown in gel media

研究成果: Article査読

196 被引用数 (Scopus)

抄録

The morphological evolution of the inorganic crystals (Ba(NO 3)2, NH4Cl, H3BO3, and K2Cr2O7) was demonstrated in various kinds of organic gel media (agar, gelatin, pectin, and poly (vinyl alcohol)). As the gel density increased, the morphology grown in the gel matrix remarkably changed from polyhedral single crystals exhibiting specifc habits into dendritic forms consisting of irregularly branched polycrystalline aggregates regardless of the sorts of inorganic compounds and gelling agents. The evolution from polyhedrons into dendrites via skeletal forms is ascribed to an increase in the influence of diffusion of the solutes on the crystal growth. Since gel media generally suppress the mobility of ions, densification of the media decreased the apparent diffusion rate of the solutes and finally promoted the formation of diffusion-limited morphologies including skeletal, dendritic, and branched forms. Peculiar curved and helical branches were observed in dendrites with crystals having a triclinic system (H3BO3 and K 2Cr2O7) because the connections of subunits were deviated in the polycrystalline aggregates.

本文言語English
ページ(範囲)711-716
ページ数6
ジャーナルCrystal Growth and Design
3
5
DOI
出版ステータスPublished - 2003 9月

ASJC Scopus subject areas

  • 化学一般
  • 材料科学一般
  • 凝縮系物理学

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