tailieunhanh - Báo cáo hóa học: " Seedless Pattern Growth of Quasi-Aligned ZnO Nanorod Arrays on Cover Glass Substrates in Solution"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Seedless Pattern Growth of Quasi-Aligned ZnO Nanorod Arrays on Cover Glass Substrates in Solution | Nanoscale Res Lett 2010 5 669-674 DOI s11671-009-9504-6 NANO PERSPECTIVES Seedless Pattern Growth of Quasi-Aligned ZnO Nanorod Arrays on Cover Glass Substrates in Solution Q. Ahsanulhaq Jin Hwan Kim Jeong Hyun Kim Y. B. Hahn Received 28 August 2009 Accepted 1 December 2009 Published online 27 December 2009 The Author s 2009. This article is published with open access at Abstract A hybrid technique for the selective growth of ZnO nanorod arrays on wanted areas of thin cover glass substrates was developed without the use of seed layer of ZnO. This method utilizes electron-beam lithography for pattern transfer on seedless substrate followed by solution method for the bottom-up growth of ZnO nanorod arrays on the patterned substrates. The arrays of highly crystalline ZnO nanorods having diameter of 60 10 nm and length of 750 50 nm were selectively grown on different shape patterns and exhibited a remarkable uniformity in terms of diameter length and density. The room temperature cathodluminescence measurements showed a strong ultraviolet emission at 381 nm and broad visible emission at 585-610 nm were observed in the spectrum. Keywords ZnO nanorod arrays Seedless pattern growth Hybrid method Introduction One-dimensional 1D ZnO nanostructure arrays aligned on substrates are highly desirable for promising device applications. For example it has been demonstrated that ZnO nano-rod nanowire arrays on proper substrates can emit ultraviolet Q. Ahsanulhaq J. H. Kim J. H. Kim Y. B. Hahn El School of Semiconductor and Chemical Engineering Department of BIN Technology and Nanomaterials Processing Research Centre Chonbuk National University Jeonju 561-756 South Korea e-mail ybhahn@ Q. Ahsanulhaq Faculty of Engineering Toyama University 3190 Gofuku Toyama 930-8555 Japan laser at room temperature 1 enhance biofluorescence detection 2 act as piezoelectric nanogenerators 3 and can be used to construct nanowire dye-sensitized solar cells 4 . .