LOW-TEMPERATURE GROWTH OF ZNO NANORODS BY CHEMICAL BATH DEPOSITION-沥快堡.pdfVIP

Journal of Colloid and Interface Science 313 (2007) 705–710 /locate/jcis Low-temperature growth of ZnO nanorods by chemical bath deposition Sung-Hak Yi, Seung-Kyu Choi, Jae-Min Jang, Jung-A Kim, Woo-Gwang Jung ∗ School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, South Korea Received 7 December 2006; accepted 3 May 2007 Available online 13 June 2007 Abstract Aligned ZnO nanorod arrays were synthesized using a chemical bath deposition method at normal atmospheric pressure without any metal catalyst. A simple two-step process was developed for growing ZnO nanorods on a PET substrate at 90–95 ◦C. The ZnO seed precursor was prepared by a sol–gel reaction. ZnO nanorod arrays were fabricated on ZnO-seed-coated substrate. The ZnO seeds were indispensable for the aligned growth of ZnO nanorods. The ZnO nanorods had a length of 400–500 nm and a diameter of 25–50 nm. HR-TEM and XRD analysis confirmed that the ZnO nanorod is a single crystal with a wurtzite structure and its growth direction is [0001] (the c-axis). Photoluminescence measurements of ZnO nanorods revealed an intense ultraviolet peak at 378.3 nm (3.27 eV) at room temperature. © 2007 Elsevier Inc. All rights reserved. Keywords: ZnO; Nanorod array; Chemical bath deposition; Sol–gel reaction; Hydrothermal; ZnO seed 1. Introduction ZnO nanorods. But many of these demand reaction conditions such as high temperatures and low or high pressures, which Semiconductors with