Enhanced ultraviolet luminescence of ZnO ...
Document type :
Compte-rendu et recension critique d'ouvrage
DOI :
Title :
Enhanced ultraviolet luminescence of ZnO nanorods treated by high-pressure water vapor annealing (HWA)
Author(s) :
Al-Nafiey, Amer [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Sieber, Brigitte [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Gelloz, B. [Auteur]
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Moreau, M. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Barjon, Julien [Auteur]
Groupe d'Etude de la Matière Condensée [GEMAC]
Girleanu, Maria [Auteur]
Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]
Ersen, Ovidiu [Auteur]
Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]
Boukherroub, Rabah [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Sieber, Brigitte [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Gelloz, B. [Auteur]
Addad, Ahmed [Auteur]

Unité Matériaux et Transformations - UMR 8207 [UMET]
Moreau, M. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Barjon, Julien [Auteur]
Groupe d'Etude de la Matière Condensée [GEMAC]
Girleanu, Maria [Auteur]
Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]
Ersen, Ovidiu [Auteur]
Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]
Boukherroub, Rabah [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Journal title :
Journal of Physical Chemistry C
Pages :
4571 - 4580
Publisher :
American Chemical Society
Publication date :
2016
ISSN :
1932-7447
English keyword(s) :
Annealing
Luminescence
Nanorods
Optical properties
Rock drills
Scanning electron microscopy
Temperature
Water treatment
Zinc
Zinc oxide
chemical method
High-pressure water vapor
Low temperatures
Raman and xps
Surface layers
Ultraviolet luminescence
Uv luminescence
Zinc oxide nanorods
water vapor
Luminescence
Nanorods
Optical properties
Rock drills
Scanning electron microscopy
Temperature
Water treatment
Zinc
Zinc oxide
chemical method
High-pressure water vapor
Low temperatures
Raman and xps
Surface layers
Ultraviolet luminescence
Uv luminescence
Zinc oxide nanorods
water vapor
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [en]
Zinc oxide nanorods (ZnO NRs), synthesized by a low temperature chemical method, were postannealed at 260°C in air and under high pressure water vapor (HWA) at 1.3-3.9 MPa. We found that the UV luminescence intensity ...
Show more >Zinc oxide nanorods (ZnO NRs), synthesized by a low temperature chemical method, were postannealed at 260°C in air and under high pressure water vapor (HWA) at 1.3-3.9 MPa. We found that the UV luminescence intensity increased by a factor of 2-3 after HWA annealing compared to that observed after annealing in air. Structural analysis of the nanorods in relation with their optical properties by means of Raman and XPS spectroscopies, transmission and scanning electron microscopies allow to conclude that the origin of the UV luminescence enhancement is due to the transformation of the Zn(OH)<sub>2</sub> surface-layer into ZnO, but also to the growth of a new thin ZnO layer at the surface of the rods. This layer is 1-2 nm thick and its presence leads to surface reconstruction of the nanorods. In addition, we show that the size and the density of the nanopores within the ZnO NRs are reduced upon HWA annealing with respect to air annealing. (Figure Presented).Show less >
Show more >Zinc oxide nanorods (ZnO NRs), synthesized by a low temperature chemical method, were postannealed at 260°C in air and under high pressure water vapor (HWA) at 1.3-3.9 MPa. We found that the UV luminescence intensity increased by a factor of 2-3 after HWA annealing compared to that observed after annealing in air. Structural analysis of the nanorods in relation with their optical properties by means of Raman and XPS spectroscopies, transmission and scanning electron microscopies allow to conclude that the origin of the UV luminescence enhancement is due to the transformation of the Zn(OH)<sub>2</sub> surface-layer into ZnO, but also to the growth of a new thin ZnO layer at the surface of the rods. This layer is 1-2 nm thick and its presence leads to surface reconstruction of the nanorods. In addition, we show that the size and the density of the nanopores within the ZnO NRs are reduced upon HWA annealing with respect to air annealing. (Figure Presented).Show less >
Language :
Anglais
Popular science :
Non
Source :