Effect of Electrodeposition Time on Microstructure, Wettability and Optical Properties of ZnO Nanorod Arrays. Issue 10 (12th September 2016)

• Record Type: Journal Article
• Authors: Gong, Zezhou; Zhang, Miao; Yao, Guang; Lv, Jianguo; Jiang, Xishun; Yang, Lei; Cheng, Yunlang; Tao, Jiajia; Wang, Xingzhi; Wang, Zhuang; He, Gang; Sun, Zhaoqi
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 10(2016)
• Page Start: E328
• Page End: E332
• Publication Date: 2016-09-12
• Subjects: Electrodeposition time -- Microstructure -- Optical properties -- Wettability -- ZnO nanorod arrays; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1201610jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : In this article, we fabricated ZnO nanorod arrays on ITO substrates by cathodic electrodeposition method under different electrodeposition times. The XRD results illustrate that all of the peaks can be attributed to the hexagonal wurtzite structure. Besides, the crystallinity and the preferred c-axis orientation increase with longer electrodeposition time. With the increasing electrodeposition time, the diameter of nanorods, the surface roughness and thickness of ZnO nanorod arrays also increased. All samples exhibit hydrophobic behavior and the water contact angle (CA) increases to 120° with the electrodeposition time increases to 120 min. After 10 min of ultraviolet (UV) irradiation, the wettability of the ZnO surfaces turn from hydrophobic to hydrophilicity, and the change of the CA reduction rate are 73.5, 63.5, 48.3 and 24.2%, corresponding to the sample electrodeposited 10, 30, 60 and 120 min, respectively. The intensity of UV emission peak ratio increases from 2.26 to 63.84% while the visible emission peak ratio decreases in PL spectra, which reveals defects decrease when electrodeposition time increases from 10 to 120 min. Raman spectrum shows three peaks which are located at 439, 566 and 1097 cm −1, corresponding to the E2, E1L and E3 mode of ZnO.