Controllable end shape modification of ZnO nano-arrays/rods by a simple wet chemical etching technique. (18th August 2015)

• Record Type: Journal Article
• Authors: Sun, Jingchang; Zhao, Ting; Ma, Zhangwei; Li, Ming; Chang, Cheng; Liang, Hongwei; Bian, Jiming; Li, Chengren
• Is Part Of: Journal of physics. Volume 48:Number 36(2015)
• Publication Date: 2015-08-18
• Subjects: 1D ZnO nano-arrays/rods -- wet etching -- etching time -- end shape; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/48/36/365303
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: The well-aligned ZnO nano-arrays/rods synthesized by a chemical bath deposition method on a highly conductive Si substrate were chemically etched in an ammonia chloride aqueous solution. An obvious end shape modification of ZnO nano-arrays/rods was realized in this report. The hexagonal frustum end of ZnO nano-arrays/rods changed into a pyramid and the diameter of ZnO nano-arrays/rods decreased gradually with the increasing etching time. The evolution mechanism of the wet etching process was discussed based on a proposed evolution model. Photoluminescence measurements indicated that the near band edge emissions of ZnO nano-arrays/rods increased greatly after wet etching. The controllable end shape modification of ZnO nano-arrays/rods on a highly conductive Si substrate by this simple wet etching technique will further explore the application of ZnO in field emission devices and 1D based nano-devices with various end shapes.