Sensing and physical properties of ZnO nanostructures membrane. (2019)

• Record Type: Journal Article
• Authors: Bazilah, Aimi; Awang, Zaiki; Sobihana Shariffudin, Shafinaz; Hazirah Hamid, Nur; Hana Herman, Sukreen
• Is Part Of: Materials today. Volume 16:Part 4(2019)
• Page Start: 1864
• Page End: 1870
• Publication Date: 2019
• Subjects: ZnO Nanostructures -- Immersion process -- Deposition time -- EGFET -- pH sensor; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2019.06.062
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Nanostructures of metal oxide semiconductors sensing membrane have received considerable attraction due to its large surface-to-volume ratios that leads to a short diffusion distance of the analyte towards the electrode surface, resulting in an improvement of pH sensitivities and response times. In this paper zinc oxide (ZnO) nanostructures were fabricated at different deposition time ranging from 1 to 5 hours using simple immersion process. The prepared samples were characterized on the physical properties and its ability as extended-gate field effect transistor (EGFET) pH sensor sensing membrane. From the results, we found that the deposition time plays an important role in pH sensor performance. The best pH sensor performance was found at 3h deposition time with 52.4 mV/pH and 0.9397 of sensitivity and linearity respectively.