title: 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.
authors.affiliation: IM2NP, CNRS UMR 6242, FST, Aix-Marseille Université, F-13397 Marseille Cedex 20, France.
authors.forename: A
authors.initials: A
authors.lastname: Savoyant
authors.forename: H
authors.initials: H
authors.lastname: Alnoor
authors.forename: S
authors.initials: S
authors.lastname: Bertaina
authors.forename: O
authors.initials: O
authors.lastname: Nur
authors.forename: M
authors.initials: M
authors.lastname: Willander