A Karim Siti Shafura, Takamura Yuzuru, Tue Phan Trong, Tung Nguyen Thanh, Kazmi Jamal, Dee Chang Fu, Yeop Majlis Burhanuddin, Mohamed Mohd Ambri
Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia.
School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi City, Ishikawa 923-1292, Japan.
Materials (Basel). 2020 Mar 4;13(5):1136. doi: 10.3390/ma13051136.
Highly ordered vertically grown zinc oxide nanorods (ZnO NRs) were synthesized on ZnO-coated SiO/Si substrate using zinc acetylacetonate hydrate as a precursor via a simple hydrothermal method at 85 °C. We used 0.05 M of ZnO solution to facilitate the growth of ZnO NRs and the immersion time was varied from 0.5 to 4 h. The atomic force microscopy revealed the surface roughness of ZnO seed layer used to grow the ZnO NRs. The morphology of vertically grown ZnO NRs was observed by field emission scanning electron microscopy. X-ray diffraction examination and transmission electron microscopy confirmed that the structure of highly ordered ZnO NRs was crystalline with a strong (002) peak corresponded to ZnO hexagonal wurtzite structure. The growth of highly ordered ZnO NRs was favorable due to the continuous supply of Zn ions and chelating agents properties obtained from the acetylacetonate-derived precursor during the synthesis. Two-point probe current-voltage measurement and UV-vis spectroscopy of the ZnO NRs indicated a resistivity and optical bandgap value of 0.44 Ω.cm and 3.35 eV, respectively. The photoluminescence spectrum showed a broad peak centered at 623 nm in the visible region corresponded to the oxygen vacancies from the ZnO NRs. This study demonstrates that acetylacetonate-derived precursors can be used for the production of ZnO NRs-based devices with a potential application in biosensors.
通过简单的水热法，以水合乙酰丙酮锌为前驱体，在85℃下于涂有ZnO的SiO/Si衬底上合成了高度有序的垂直生长氧化锌纳米棒（ZnO NRs）。我们使用0.05M的ZnO溶液来促进ZnO NRs的生长，浸泡时间从0.5小时变化到4小时。原子力显微镜揭示了用于生长ZnO NRs的ZnO籽晶层的表面粗糙度。通过场发射扫描电子显微镜观察垂直生长的ZnO NRs的形态。X射线衍射检查和透射电子显微镜证实，高度有序的ZnO NRs结构为晶体，具有对应于ZnO六方纤锌矿结构的强（002）峰。由于在合成过程中从乙酰丙酮衍生的前驱体中获得的Zn离子和螯合剂特性的持续供应，高度有序的ZnO NRs的生长是有利的。ZnO NRs的两点探针电流-电压测量和紫外-可见光谱表明，其电阻率和光学带隙值分别为0.44Ω·cm和3.35eV。光致发光光谱在可见光区域显示出一个以623nm为中心的宽峰，对应于ZnO NRs中的氧空位。这项研究表明，乙酰丙酮衍生的前驱体可用于生产基于ZnO NRs的器件，在生物传感器中具有潜在应用。
