Publikation: Polymer-Controlled Crystallization of Zinc Oxide Hexagonal Nanorings and Disks
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In this study, we have developed a novel route to the synthesis of ZnO nanorings, disks, and diskoidlike crystals on a large scale by a facile solution-based method by using polymers as crystal growth modifiers. The crystals precipitated with polyacrylamide (PAM) as the additive show ringlike morphology. A possible growth mechanism of the ZnO nanostructures based on typical polymer-crystals interactions in a mild aqueous solution is given. The polymer contains in the side chain a large number of amide ligands that are able to coordinate with Zn(2+) ions, that is, the otherwise just weakly exposed (001) face, leading to a lowering of surface energy and inhibition of growth along this direction and the formation of ringlike morphologies. While in the presence of carboxyl-functionalized polyacrylamide (PAM-COOH), nearly monodispersed disklike crystals were observed and finally evolved into diskoidlike microstructures with the reaction time prolonged. Polymer-directed crystal growth and mediated self-assembly of nanocrystals may provide promising routes to rational synthesis of various ordered inorganic and inorganic-organic hybrid materials with complex form and structural specialization.
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PENG, Yin, An-Wu XU, Bin DENG, Markus ANTONIETTI, Helmut CÖLFEN, 2006. Polymer-Controlled Crystallization of Zinc Oxide Hexagonal Nanorings and Disks. In: The Journal of Physical Chemistry B. 2006, 110(7), pp. 2988-2993. ISSN 1520-6106. eISSN 1520-5207. Available under: doi: 10.1021/jp056246dBibTex
@article{Peng2006Polym-40384,
year={2006},
doi={10.1021/jp056246d},
title={Polymer-Controlled Crystallization of Zinc Oxide Hexagonal Nanorings and Disks},
number={7},
volume={110},
issn={1520-6106},
journal={The Journal of Physical Chemistry B},
pages={2988--2993},
author={Peng, Yin and Xu, An-Wu and Deng, Bin and Antonietti, Markus and Cölfen, Helmut}
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<dcterms:abstract xml:lang="eng">In this study, we have developed a novel route to the synthesis of ZnO nanorings, disks, and diskoidlike crystals on a large scale by a facile solution-based method by using polymers as crystal growth modifiers. The crystals precipitated with polyacrylamide (PAM) as the additive show ringlike morphology. A possible growth mechanism of the ZnO nanostructures based on typical polymer-crystals interactions in a mild aqueous solution is given. The polymer contains in the side chain a large number of amide ligands that are able to coordinate with Zn(2+) ions, that is, the otherwise just weakly exposed (001) face, leading to a lowering of surface energy and inhibition of growth along this direction and the formation of ringlike morphologies. While in the presence of carboxyl-functionalized polyacrylamide (PAM-COOH), nearly monodispersed disklike crystals were observed and finally evolved into diskoidlike microstructures with the reaction time prolonged. Polymer-directed crystal growth and mediated self-assembly of nanocrystals may provide promising routes to rational synthesis of various ordered inorganic and inorganic-organic hybrid materials with complex form and structural specialization.</dcterms:abstract>
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