Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Formation mechanisms of ZnO nanowires on polycrystalline Au seed layers for piezoelectric applications

Abstract : ZnO nanowires are considered as attractive building blocks for piezoelectric devices, including nano-generators and stress/strain sensors. However, their integration requires the use of metallic seed layers, on top of which the formation mechanisms of ZnO nanowires by chemical bath deposition are still largely open. In order to tackle that issue, the nucleation and growth mechanisms of ZnO nanowires on top of Au seed layers with a thickness in the range of 5-100 nm are thoroughly investigated. We show that the ZnO nanowires present two different populations of nano-objects with a given morphology. The majority primary population is made of vertically aligned ZnO nanowires, which are heteroepitaxially formed on top of the Au (111) grains. The resulting epitaxial strain is found to be completely relieved at the Au/ZnO interface. In contrast, the minority secondary population is composed of ZnO nanowires with a significant mean tilt angle around 20°with respect to the normal to the substrate surface, which are presumably formed on the (211) facets of the Au (111) grains. The elongation of ZnO nanowires is further found to be limited by the surface reaction at the c-plane top facet in the investigated conditions. By implementing the selective area growth using electron beam lithography, the position of ZnO nanowires is controlled, but the two populations still co-exist in the ensemble. These findings provide an in-depth understanding of the formation mechanisms of ZnO nanowires on metallic seed layers, which should be taken into account for their more efficient integration into piezoelectric devices. Supplementary material for this article is available online
Type de document :
Article dans une revue
Domaine :
Liste complète des métadonnées

Littérature citée [55 références]  Voir  Masquer  Télécharger

https://hal.univ-grenoble-alpes.fr/hal-02151193
Contributeur : Labo Lmgp <>
Soumis le : samedi 12 octobre 2019 - 15:05:22
Dernière modification le : samedi 1 août 2020 - 03:03:41
Archivage à long terme le : : lundi 13 janvier 2020 - 14:06:17

Fichier

Lausecker_2019_Nanotechnology_...
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Clément Lausecker, Bassem Salem, Xavier Baillin, Hervé Roussel, Eirini Sarigiannidou, et al.. Formation mechanisms of ZnO nanowires on polycrystalline Au seed layers for piezoelectric applications. Nanotechnology, Institute of Physics, 2019, 30 (34), pp.345601. ⟨10.1088/1361-6528/ab1d6e⟩. ⟨hal-02151193⟩

Partager

Métriques

Consultations de la notice

314

Téléchargements de fichiers

736