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EPR investigation of pure and Co-doped ZnO oriented nanocrystals

Abstract : Pure and cobalt-doped zinc oxide aligned nanorods have been grown by the low-temperature (90 °C) aqueous chemical method on amorphous ZnO seed layer, deposited on a sapphire substrate. High crystallinity of these objects is demonstrated by the electron paramagnetic resonance investigation at liquid helium temperature. The successful incorporation of Co2+ ions in substitution of Zn2+ ones in the ZnO matrix has also been confirmed. A drastic reduction of intrinsic ZnO nanorods core defects is observed in the Co-doped samples, which enhances the structural quality of the NRs. The quantification of substitutional Co2+ ions in the ZnO matrix is achieved by comparison with a reference sample. The findings in this study indicate the potential of using the low-temperature aqueous chemical approach for synthesizing material for spintronics applications. Keywords:
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Submitted on : Wednesday, February 22, 2017 - 11:34:25 AM
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Adrien Savoyant, H Alnoor, Sylvain Bertaina, O Nur, M Willander. EPR investigation of pure and Co-doped ZnO oriented nanocrystals. Nanotechnology, Institute of Physics, 2017, 28 (3), ⟨10.1088/1361-6528/28/3/035705⟩. ⟨hal-01473894⟩



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