Morphology and orientation control of guanine crystals: A biogenic architecture and its structure mimetics

Yuya Oaki, Soichiro Kaneko, Hiroaki Imai

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The surface skin of a banded blue-sprat had the mesocrystal structures of biogenic guanine crystals and cytoplasm. The platy guanine crystals were organized in the parallel direction to the surface skin with incorporation of cytoplasm. The size of the platy guanine crystal as a unit was larger than that of the other fish. Inspired by the biogenic structures, we studied the morphology and orientation control of molecular crystals consisting of organic molecules. When guanine was recrystallized on a glass substrate in the absence of any organic molecules, an aggregate of the platy crystals arranged perpendicular to the substrate was formed. The morphology and orientation of recrystallized guanine were different from those of the biogenic one. We have applied biomimetic approaches to control the morphology and orientation of the molecular crystals. The thin platy guanine crystals were formed parallel to the chitosan substrate through the recrystallization in the presence of additive organic molecules. The additive organic molecules and the modified substrates facilitated the morphology and orientation control. The present results suggest that biomimetic approaches for the morphological control of inorganic and ionic crystals can be applied for controlled deposition of a variety of organic and molecular crystals.

Original languageEnglish
Pages (from-to)22686-22691
Number of pages6
JournalJournal of Materials Chemistry
Volume22
Issue number42
DOIs
Publication statusPublished - 2012 Nov 14

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Guanine
Crystal orientation
Molecular crystals
Crystals
Molecules
Biomimetics
Substrates
Skin
Chitosan
Fish
Glass

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

Cite this

Morphology and orientation control of guanine crystals : A biogenic architecture and its structure mimetics. / Oaki, Yuya; Kaneko, Soichiro; Imai, Hiroaki.

In: Journal of Materials Chemistry, Vol. 22, No. 42, 14.11.2012, p. 22686-22691.

Research output: Contribution to journalArticle

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