Optical properties of zno nanowires and its sensing potential for lactate oxidase determination using surface plasmon resonance spectroscopy

Ismayudin, Iffah Nabilah (2022) Optical properties of zno nanowires and its sensing potential for lactate oxidase determination using surface plasmon resonance spectroscopy. [Project Paper] (Submitted)

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Abstract

Zinc oxide nanowires (ZnO NWs) has become one of the important metal oxide nanostructures that is widely use nowadays due to their high sensitivity characteristic and it is a low-cost material. Therefore, the purpose of this project is to focus on the characterization of ZnO nanowires growth and its sensing properties in the surface plasmon resonance (SPR) technique. The condition of seed layer of the ZnO nanowires is chosen to study the effect on the structural optical and sensing properties for better optical sensing. The optical and sensing properties of these ZnO thin films have been investigated by UV-Visible spectroscopy (UV-Vis) and surface plasmon resonance (SPR) technique. The UV-Vis study indicate that both annealed and unannealed ZnO nanowires have absorption peak at the range of 278 nm to 280 nm and thus, proved the absorption of the ZnO bandgap. From the Tauc plot, the band gap energy of both annealed and unannealed ZnO nanowires were determined to be 4.03 eV. The SPR results showed that the right shift of incident angle from 53.56° to 54.39° for the samples that are tested with the deionized water when the sample is annealed. However, a left shift of SPR incident angle from 57.47° to 56.35° is observed for the lactic acid detection when the sample is annealed. This project proved that the ZnO nanowires can act as an active layer for the SPR biosensor.

Item Type:	Project Paper
Faculty:	Fakulti Sains
Depositing User:	Ms. ROHANA ALIAS
Date Deposited:	25 Jun 2024 10:20
Last Modified:	25 Jun 2024 10:20
URI:	http://psaspb.upm.edu.my/id/eprint/1995

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