Formation of Unusual 10-Petal BaSO4 Structures in the Presence of a Polymeric Additive

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2002
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Qi, Limin
Mastai, Yitzhak
Börger, Lars
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10.1021/cg025507v
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Crystal Growth & Design ; 2 (2002), 3. - pp. 191-196. - ISSN 1528-7483. - eISSN 1528-7505
Abstract
In this work, the formation of unusual flowerlike structures with 10-petals composed of BaSO4 single crystalline platelets is described. The structures are obtained at pH 5 in an aqueous solution in the presence of a double hydrophilic block copolymer poly(ethylene oxide)-block-sulfonated poly(ethylene imine) (PEO-b-PEI-SO3H) by site-specific polymer adsorption. The exposed faces are identified, the atomar surface structures of these faces are calculated, and preferred faces for polymer adsorption are found. A model for the growth of the unusual 10-petal BaSO4 structures is presented which is based on the nucleation of primary particles, secondary growth of the petals, and finally layer wise petal overgrowth.
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540 Chemistry
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ISO 690CÖLFEN, Helmut, Limin QI, Yitzhak MASTAI, Lars BÖRGER, 2002. Formation of Unusual 10-Petal BaSO4 Structures in the Presence of a Polymeric Additive. In: Crystal Growth & Design. 2(3), pp. 191-196. ISSN 1528-7483. eISSN 1528-7505. Available under: doi: 10.1021/cg025507v
BibTex
@article{Colfen2002-05Forma-40527,
  year={2002},
  doi={10.1021/cg025507v},
  title={Formation of Unusual 10-Petal BaSO<sub>4</sub> Structures in the Presence of a Polymeric Additive},
  number={3},
  volume={2},
  issn={1528-7483},
  journal={Crystal Growth & Design},
  pages={191--196},
  author={Cölfen, Helmut and Qi, Limin and Mastai, Yitzhak and Börger, Lars}
}
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