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Fabrication of Well-Aligned ZnO Nanorods Using a Composite Seed Layer of ZnO Nanoparticles and Chitosan Polymer
Physical Electronics and Nanotechnology Division, Department of Science and Technology, Campus Norrkoping, Linkoping University, Norrkoping SE-60174, Sweden
Research Chair for Laser Diagnosis of Cancer, King Saud University, Riyadh 11451, Saudi Arabia
Physics and Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 11451, Saudi Arabia
* Author to whom correspondence should be addressed.
Received: 8 August 2013; in revised form: 9 September 2013 / Accepted: 22 September 2013 / Published: 30 September 2013
Abstract: In this study, by taking the advantage of both inorganic ZnO nanoparticles and the organic material chitosan as a composite seed layer, we have fabricated well-aligned ZnO nanorods on a gold-coated glass substrate using the hydrothermal growth method. The ZnO nanoparticles were characterized by the Raman spectroscopic techniques, which showed the nanocrystalline phase of the ZnO nanoparticles. Different composites of ZnO nanoparticles and chitosan were prepared and used as a seed layer for the fabrication of well-aligned ZnO nanorods. Field emission scanning electron microscopy, energy dispersive X-ray, high-resolution transmission electron microscopy, X-ray diffraction, and infrared reflection absorption spectroscopic techniques were utilized for the structural characterization of the ZnO nanoparticles/chitosan seed layer-coated ZnO nanorods on a gold-coated glass substrate. This study has shown that the ZnO nanorods are well-aligned, uniform, and dense, exhibit the wurtzite hexagonal structure, and are perpendicularly oriented to the substrate. Moreover, the ZnO nanorods are only composed of Zn and O atoms. An optical study was also carried out for the ZnO nanoparticles/chitosan seed layer-coated ZnO nanorods, and the obtained results have shown that the fabricated ZnO nanorods exhibit good crystal quality. This study has provided a cheap fabrication method for the controlled morphology and good alignment of ZnO nanorods, which is of high demand for enhancing the working performance of optoelectronic devices.
Keywords: ZnO nanoparticles; chitosan; ZnO nanorods; well-aligned; low-temperature growth
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Khun, K.; Ibupoto, Z.H.; AlSalhi, M.S.; Atif, M.; Ansari, A.A.; Willander, M. Fabrication of Well-Aligned ZnO Nanorods Using a Composite Seed Layer of ZnO Nanoparticles and Chitosan Polymer. Materials 2013, 6, 4361-4374.
Khun K, Ibupoto ZH, AlSalhi MS, Atif M, Ansari AA, Willander M. Fabrication of Well-Aligned ZnO Nanorods Using a Composite Seed Layer of ZnO Nanoparticles and Chitosan Polymer. Materials. 2013; 6(10):4361-4374.
Khun, Kimleang; Ibupoto, Zafar H.; AlSalhi, Mohamad S.; Atif, Muhammad; Ansari, Anees A.; Willander, Magnus. 2013. "Fabrication of Well-Aligned ZnO Nanorods Using a Composite Seed Layer of ZnO Nanoparticles and Chitosan Polymer." Materials 6, no. 10: 4361-4374.