Please use this identifier to cite or link to this item: https://doi.org/10.1021/jp803908a
Title: Local structures of Zn1-xTMxO (TM = Co, Mn, and Cu) nanoparticles studied by X-ray absorption fine structure spectroscopy and multiple scattering calculations
Authors: Liu, T. 
Xu, H. 
Chin, W.S. 
Yang, P. 
Yong, Z.
Wee, A.T.S. 
Issue Date: 4-Sep-2008
Citation: Liu, T., Xu, H., Chin, W.S., Yang, P., Yong, Z., Wee, A.T.S. (2008-09-04). Local structures of Zn1-xTMxO (TM = Co, Mn, and Cu) nanoparticles studied by X-ray absorption fine structure spectroscopy and multiple scattering calculations. Journal of Physical Chemistry C 112 (35) : 13410-13418. ScholarBank@NUS Repository. https://doi.org/10.1021/jp803908a
Abstract: Transitional metal doped ZnO is a good candidate for dilute magnetic semiconductors possessing high Curie temperature ferromagnetism. The local atomic configuration of dopant elements in ZnO is an important issue for understanding their ferromagnetic mechanism. In this work Co, Mn, and Cu doped ZnO nanoparticles with particle size of about 5 nm were prepared by the coprecipitation method. X-ray absorption fine structure spectra were measured at doppant metal K-edges for the as-prepared and calcinated samples. The results show significantly different local structural evolutions for various dopant element doping and heat treatment. Co-doped nanoparticles are stable up to high temperature calcinations, while Mn and Cu in ZnO exhibit complex interatomic diffusion and reduction behavior activated by modest calcinations, and this is explained by either a charge transfer from ZnO to doppant element or the reduction induced by thermal decomposition products of surfactants. Multiple scattering calculations were performed on Co substituted ZnO clusters to simulate the Co clustering in ZnO and its effect on the measured X-ray absorption fine structure spectra. © 2008 American Chemical Society.
Source Title: Journal of Physical Chemistry C
URI: http://scholarbank.nus.edu.sg/handle/10635/115797
ISSN: 19327447
DOI: 10.1021/jp803908a
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