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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: Facile Synthesis of ZnO Nanorods by Microwave Irradiation of Zinc–Hydrazine Hydrate Complex Denthaje Krishna Bhat | Nanoscale Res Lett 2008 3 31-35 DOI 10.1007 s11671-007-9110-4 NANO EXPRESS Facile Synthesis of ZnO Nanorods by Microwave Irradiation of Zinc-Hydrazine Hydrate Complex Denthaje Krishna Bhat Received 2 July 2007 Accepted 28 November 2007 Published online 11 December 2007 to the authors 2007 Abstract ZnO nanorods have been successfully synthesized by a simple microwave-assisted solution phase approach. Hydrazine hydrate has been used as a mineralizer instead of sodium hydroxide. XRD and FESEM have been used to characterize the product. The FESEM images show that the diameter of the nanorods fall in the range of about 25-75 nm and length in the range of 500-1 500 nm with an aspect ratio of about 20-50. UV-VIS and photoluminescence spectra of the nanorods in solution have been taken to study their optical properties. A mechanism for microwave synthesis of the ZnO nanorods using hydrazine hydrate precursor has also been proposed. Keywords ZnO Nanorods Microwave irradiation Optical properties Hydrazine hydrate Introduction Quasi one dimensional nanostructured materials nanotubes nanobelts nanorods and nanowires have recently attracted considerable attention due to their novel properties and potential applications in numerous areas such as nanoscale electronics and photonics 1-3 . ZnO is an important electronic and photonic material because of its wide band gap of 3.37 eV and high mechanical and thermal stabilities at room temperature 4 . The strong exciton binding energy of ZnO is much larger than that of GaN and D. K. Bhat H Department of Chemistry National Institute of Technology Karnataka Surathkal Mangalore 575025 India e-mail denthaje@gmail.com the thermal energy of ZnO which can ensure an efficient exciton emission at room temperature 5 6 . Room temperature UV lasing properties have been demonstrated from ZnO epitaxial films nanoclusters and nanowires 2 7-9 . Hence ZnO is a promising photonic material in the blue UV region. For example as UV laser it can allow .
