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Bi-template effect of a vegetal system on the synthesis of alkaline-earth tungstate nanocrystals

Published online by Cambridge University Press:  31 January 2011

Dong-Mei Sun ,
Da-Zhang Zhu  and
Qing-Sheng Wu
Dong-Mei Sun
Affiliation:
Department of Chemistry, Tongji University, Shanghai 200092, People's Republic of China; and School of Life Science and Technology, Tongji University, Shanghai 200092, People's Republic of China
Qing-Sheng Wu*
Affiliation:
Department of Chemistry, Tongji University, Shanghai 200092, People's Republic of China
*
a) Address all correspondence to this author. e-mail: qswu@tongji.edu.cn
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Abstract

The MBS (mung bean sprouts) vegetal system, with its high penetrability, high selectivity, and space restriction, was explored to control nanocrystal synthesis. We found that the inside and outside of MBS have different structures and ion transformation properties. Two nanocrystals with distinct morphology, the nanorod and the nanosphere, were grown on the outer surface and the inner stem wall of MBS, respectively. The two XWO4 (X = Ca,Sr,Ba) nanocrystals were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD), and Fourier transform infrared (FTIR). The FTIR spectra of nanoproducts were different from bulk products due to the nano-size effect. A presumable mechanism was also determined. This work benefits the application of nanotungstates.

Keywords

Biomimetic (chemical reaction)Crystal growthNanoscale
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 2 , February 2009 , pp. 347 - 351
Copyright
Copyright © Materials Research Society 2009

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References

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