Please use this identifier to cite or link to this item: https://doi.org/10.1021/jp075864m
Title: Local structural evolution of Co-doped ZnO nanoparticles upon calcination studied by in situ quick-scan XAFS
Authors: Liu, T. 
Xu, H. 
Chin, W.S. 
Yong, Z.
Wee, A.T.S. 
Issue Date: 13-Mar-2008
Citation: Liu, T., Xu, H., Chin, W.S., Yong, Z., Wee, A.T.S. (2008-03-13). Local structural evolution of Co-doped ZnO nanoparticles upon calcination studied by in situ quick-scan XAFS. Journal of Physical Chemistry C 112 (10) : 3489-3495. ScholarBank@NUS Repository. https://doi.org/10.1021/jp075864m
Abstract: Co-doped ZnO is a good dilute ferromagnetic semiconductor candidate with high Curie temperature. In this work, Zn0.93Co0.07O nanoparticles of about 5 nm in size were synthesized by the coprecipitation method. X-ray absorption fine structure spectra at both Co and Zn K-edges were acquired at an in situ and quick-scan mode while the sample was heated to 730 °C in air. The results show a good incorporation of cobalt ions into substitutional zinc sites in zinc oxide. Upon calcination, a systematic structural variation can be monitored, from removal of hydroxyl groups to cobalt oxide precipitation. The Einstein temperature, estimated from the Debye-Waller factor-temperature plot, indicates a stronger Co-ligand bond strength in the lattice compared to that of the ZnO matrix. © 2008 American Chemical Society.
Source Title: Journal of Physical Chemistry C
URI: http://scholarbank.nus.edu.sg/handle/10635/113024
ISSN: 19327447
DOI: 10.1021/jp075864m
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