Vaterite selection by chitosan gel: An example of polymorph selection by morphology of biomacromolecules

Xiao, J. W., Zhu, Y. C., Liu, Y. Y., Liu, H. J., Zeng, Y., Xu, F. F. and Wang, L. Z. (2008) Vaterite selection by chitosan gel: An example of polymorph selection by morphology of biomacromolecules. Crystal Growth & Design, 8 8: 2887-2891. doi:10.1021/cg701233y


Author Xiao, J. W.
Zhu, Y. C.
Liu, Y. Y.
Liu, H. J.
Zeng, Y.
Xu, F. F.
Wang, L. Z.
Title Vaterite selection by chitosan gel: An example of polymorph selection by morphology of biomacromolecules
Journal name Crystal Growth & Design   Check publisher's open access policy
ISSN 1528-7483
Publication date 2008-08-01
Year available 2008
Sub-type Article (original research)
DOI 10.1021/cg701233y
Open Access Status
Volume 8
Issue 8
Start page 2887
End page 2891
Total pages 5
Editor Rogers, R. D.
Place of publication United States
Publisher American Chemical Society
Language eng
Subject C1
100708 Nanomaterials
970103 Expanding Knowledge in the Chemical Sciences
Abstract Polymorph selection of biominerals is an interesting phenomenon as observed in some natural shells, which contain distinct polymorphs of calcium carbonate in one organism. The reason why distinct polymorphs present in different portions of organisms has attracted increasing attention. In this work, we selectively synthesized calcite nanoparticles and vaterite hexagonal plates under conditions with different morphologies of chitosan chains. Calcite nanoparticles were homogeneously nucleated in the chitosan sol, and capsulated by semirigid polycation chitosan chains through electrostatic attraction. The metastable vaterite crystals in hexagonal symmetry were heterogeneously nucleated at the interface of chitosan gel, and stabilized through stereochemically matched hydrogen bonding interactions with flexible chitosan chains, which reduces the unstable (001) faces surface energy.
Keyword Calcium-Carbonate Films
Oriented Crystallization
Charge-Density
Aragonite
Caco3
Monolayers
Growth
Crystals
Gelation
Macromolecules
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes 10.1021/cg701233y

Document type: Journal Article
Sub-type: Article (original research)
Collection: 2009 Higher Education Research Data Collection
 
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Created: Fri, 17 Apr 2009, 20:48:04 EST by Amanda Lee on behalf of School of Chemical Engineering