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U. ALVER1,2,* , A. KUDRET1, S. KERLI1
ZnO rod arrays have been grown on glass substrates with different pH by using a simple hydrothermal method at 95 °C without using a seed layer. Zinc nitrate hexahydrate ((Zn(NO3)2.6H2O) was used as source of zinc ion, while hexamethylene tetrammine (HMT, C6H12N4) solution served as the complexing agent. Ammonia (NH4OH) and acetic acid (CH3COOH) were used to achieve the desired pH value. No deposition is observed for the solution having pH values of 4 and 10. The effect of pH of precursor solution on structural, morphological and optical properties of ZnO rod arrays was investigated. XRD results indicate that the ZnO rods arrays are growing along [002] direction with a high consistent orientation perpendicular to the substrate. SEM images reveal that increase in the pH value from 5 to 9 leads to decrease in the size of rods grown on substrate. The optical measurements show that there is no significant change in the band gap of rod arrays with increasing the pH of the starting solution..
Hydrothermal growth, ZnO rod arrays, pH, Nanostructure.
U. ALVER, A. KUDRET, S. KERLI, Influence of pH on structural, optical and morphological properties of ZnO rod arrays fabricated by hydrothermal method, Optoelectronics and Advanced Materials - Rapid Communications, 6, 1-2, January-February 2012, pp.107-109 (2012).
Submitted at: May 18, 2011
Accepted at: Feb. 20, 2012
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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