Structural modification of ZnO nanorod array through Fe-doping: Ramification on UV and humidity sensing properties

• Published in: Nano-Structures and Nano-Objects
• Main Author: Ismail A.S.; Mamat M.H.; Shameem Banu I.B.; Amiruddin R.; Malek M.F.; Parimon N.; Zoolfakar A.S.; Md. Sin N.D.; Suriani A.B.; Ahmad M.K.; Rusop M.
• Format: Article
• Language: English
• Published: Elsevier B.V. 2019
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062386100&doi=10.1016%2fj.nanoso.2019.100262&partnerID=40&md5=6fa245461733c6b09f00b9b345760483
• ISSN: 2352507X
• DOI: 10.1016/j.nanoso.2019.100262

Iron (Fe)-doped zinc oxide (ZnO) nanotip arrays (FZO) were prepared using low temperature sol–gel immersion method. The X-ray diffraction analysis reveals that the crystallite size reduces from 30.7 to 28.3 nm after doped with Fe. Besides, it is perceived that the lattice strain metamorphoses from tensile to compressive strain after doping with value of -0.23%. Field emission scanning electron microscopy images show that the Fe doping induced a significant modification to the ZnO structure; transforming the structure from rod-like to tip-like structure. The current–voltage measurement results indicate that the FZO film has good electrical properties with resistance value of 12.34 MΩ. The FZO is also capable of performing well as UV and humidity sensors. This study points out that FZO films are suitable for multifunctional uses particularly for UV and humidity sensing. © 2019 Elsevier B.V.