Developing Conductive Highly Ordered Zinc Oxide Nanorods by Acetylacetonate-Assisted Growth

Materials

卷:13

NguyenThanh Tung¹  ChangFu Dee²  Burhanuddin Yeop Majlis²  MohdAmbri Mohamed²  SitiShafura A Karim²  Jamal Kazmi²  PhanTrong Tue³  Yuzuru Takamura⁴ 

[1] Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6, Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japan;

[2] Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia;

[3] Laboratory for Materials and Structures, Department of Materials Science and Engineering, Tokyo Institute of Technology (TITech), Yokohama 226-8503, Japan;

[4] School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi City, Ishikawa 923-1292, Japan;

关键词: acetylacetonate;    conductive;    highly ordered;    hydrothermal;    nanorods;    vertical growth;    zinc oxide;   

DOI  :  10.3390/ma13051136

来源: DOAJ

【 摘 要 】

Highly ordered vertically grown zinc oxide nanorods (ZnO NRs) were synthesized on ZnO-coated SiO₂/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 Zn²⁺ 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.

【 授权许可】

Unknown