Transformation of novel morphologies and polymorphs of CaCO3 crystals induced by the anionic surfactant SDS

Anionic surfactant SDS was used to modify the polymorph and morphology of CaCO3 crystals. Vaterite, aragonite and calcite with novel morphologies were fabricated. Anionic surfactant, sodium dodecyl sulfate (SDS), was used as a template to modify the formation of CaCO3 crystals. Aragonite was produce...

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Published inMaterials chemistry and physics Vol. 123; no. 2-3; pp. 534 - 539
Main Authors Chen, Zhiying, Li, Caifen, Yang, Qianqian, Nan, Zhaodong
Format Journal Article
LanguageEnglish
Published 01.10.2010
Subjects
Aragonite
Blocking
Calcite
Calcium carbonate
Crystals
Morphology
Sodium
Surfactants
Transformations
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Summary:Anionic surfactant SDS was used to modify the polymorph and morphology of CaCO3 crystals. Vaterite, aragonite and calcite with novel morphologies were fabricated. Anionic surfactant, sodium dodecyl sulfate (SDS), was used as a template to modify the formation of CaCO3 crystals. Aragonite was produced when the concentration of SDS was controlled at 0.5mM. The rod-shaped aragonite aggregated by block-like particles was fabricated. Pure vaterite with a novel flower-shaped morphology was obtained when the concentration of SDS was 1.0mM. When the concentration of SDS was increased to 2.5mM, a mixture composed of vaterite and calcite was produced. And the as-prepared sample showed various morphologies, including tube-shaped, rod-shaped and hexagonal structures. However, the most interesting result is that rhombohedral calcite may be transformed from hexagonal vaterite. This result may prove useful to the further investigation of the processes of biomineralization.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0254-0584
DOI:10.1016/j.matchemphys.2010.05.010