Synthesis of ZnWO4@MWO4 (M = Mn, Fe) Core−Shell Nanorods with Optical and Antiferromagnetic Property by Oriented Attachment Mechanism

Qiao Zhang,† Xianyu Chen,† Yuxue Zhou,† Guobing Zhang,‡ and Shu-Hong Yu*†
Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry and National Synchrotron Radiation Laboratory, Department of Physics, University of Science and Technology of China, Hefei, 230026, P. R. China
J. Phys. Chem. C, 2007, 111 (10), pp 3927–3933
DOI: 10.1021/jp068282y
Publication Date (Web): February 17, 2007
Copyright © 2007 American Chemical Society
†

 Department of Chemistry.

,
‡

 Department of Physics.

,
*

 Corresponding author. E-mail:  shyu@ustc.edu.cn. Fax:  +86 551 3603040.

Abstract

Uniform core−shell heterostructured ZnWO4@MWO4 (M = Mn, Fe) nanorods with both optical and antiferromagnetic properties have been synthesized by a simple refluxing method under mild conditions in which the crystallization event of MWO4 happened on the backbone of ZnWO4 single crystalline nanorods in a ligand-free system. ZnWO4 nanorod-directed oriented aggregation mechanism has been clearly observed for the formation of heterostructured ZnWO4@MWO4 (M = Mn, Fe) nanorods. The shell thickness of MWO4 (M = Mn, Fe) could be tuned by changing the molar ratio of these raw materials. UV−visible absorption spectra and photoluminescence (PL) spectra of the as-prepared ZnWO4@MWO4 (M = Mn, Fe) core−shell nanorods show the similar “red-shift” trend, which can be ascribed to the influences of the out-layered shell. The ZnWO4@MWO4 (M = Mn, Fe) nanorods displayed both optical and antiferromagnetic properties. The result demonstrated that the multifunctional anisotropic nanostructures with a heteroshell could be synthesized directly based on the oriented attachment mechanism.

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History

  • Published In Issue March 15, 2007
  • Received December 2, 2006
    Revised January 16, 2007

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