Control growth of catalyst-free ZnO tetrapods on glass substrate by thermal evaporation method. Issue 11 (15th August 2016)

• Record Type: Journal Article
• Authors: Alsultany, Forat H.; Hassan, Z.; Ahmed, Naser M.
• Is Part Of: Ceramics international. Volume 42:Issue 11(2016)
• Page Start: 13144
• Page End: 13150
• Publication Date: 2016-08-15
• Subjects: ZnO -- Large scale -- Catalyst free -- X-Ray diffraction -- UV emission -- Enhancement; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.05.102
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Novel three-step directions of glass substrate for catalyst-free growth of ZnO tetrapods (ZnO-Ts) without using catalyst or seed layer via thermal evaporation method were investigated. In this study, controlled synthesis of ZnO-Ts was achieved through glancing angle deposition by three-step directions of glass substrate with inclination angles of 0°, 45°, and 90° toward the gas flow at a growth temperature of 650 °C. The effects of substrate inclination angles on the morphological, structural, and optical properties were systematically investigated using field emission scanning electron microscopy, X-ray diffraction, UV–vis spectroscopy, and photoluminescence spectrum. Results showed that the substrate tilt angle is one of the most critical control parameters in determining the nucleation and growth of ZnO-Ts. This new approach provides a cost-effective and simple method for the synthesis of tetrapods, which can be useful in various optoelectronic applications and solid-state devices. Highlights: Various morphologies of ZnO-Ts were synthesized on glass substrate. Glass substrate without any catalyst or seed layer was employed. The effect of substrate inclination angles on ZnO-Ts structures was investigated. The crystal quality of ZnO-Ts strongly depends on the substrate tilt angle. Larger-angle deposition can enhance the nucleation and crystallinity of ZnO-Ts.