Surface-related emissions and ferromagnetism in undoped ZnO nanorods

Abstract : Pristine ZnO nanorods were synthesized by hydrothermal method. The samples have a single phase nature with wurtzite structure and no other impurity phases were detected. The presence of OH groups on the as-grown samples surface was confirmed. After vacuum annealing and H2O2 solution treatment, the surface states and oxygen vacancies were modified in ZnO nanorods, resulting in suppressing the visible emission band and reducing the room temperature ferromagnetism (RTFM). Experimental results suggest that OH groups could be responsible for the strong broad yellow emission band and RTFM for as-grown ZnO nanorods. Green emission bands in vacuum annealed and H2O2-solution-treated samples could be attributed to singly ionized oxygen vacancy (V-0(+)). A plausible explanation for the observed weak RTFM is presented in terms of V-0(+) for the annealed sample, whereas V-0(+) and residual OH groups for H2O2-solution-treated samples.
Type de document :
Article dans une revue
Superlattices and Microstructures, Elsevier, 2013, 64, pp.375-387. 〈10.1016/j.spmi.2013.10.012〉
Domaine :
Liste complète des métadonnées

https://hal.univ-lorraine.fr/hal-01278790
Contributeur : Lrgp Ul <>
Soumis le : mercredi 24 février 2016 - 18:10:48
Dernière modification le : jeudi 11 janvier 2018 - 06:25:27

Identifiants

Collections

Citation

Shaobo Shi, Zhi-Min Dang, Jianping Xu, Lan Li, Guo-Hua Hu. Surface-related emissions and ferromagnetism in undoped ZnO nanorods. Superlattices and Microstructures, Elsevier, 2013, 64, pp.375-387. 〈10.1016/j.spmi.2013.10.012〉. 〈hal-01278790〉

Partager

Métriques

Consultations de la notice

65