ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Multi-ion (Na⁺/ K⁺/Ca²⁺/Mg²⁺) EGFET sensor based on heterostructure of ZrO₂-NPs/MacroPSi

Samira A. Asoka, Lary H. Slewa, and Tariq A. Abbas

Physics Department, College of Science, Salahaddin University-Erbil, Erbil, Iraq

E-mail: laryslewa83@gmail.com

Received: 23 July 2022  Accepted: 17 October 2022

Abstract:

In this study, a heterostructure of ZrO₂-NPs/MacroPSi EGFET was reported to the detection of biologically important human metal ions such as Na⁺, K⁺, Ca²⁺, and Mg²⁺. Using the solvothermal technique, ZrO₂ nanoparticles were synthesized on the surface and wall of MacroPSi. Field-emission scanning electron microscopy (FESEM) and X-ray diffractometer (XRD) are used to determine the morphology and structure of ZrO₂ nanoparticles, respectively. Afterward, an extended gate field-effect transistor (EGFET) based on a heterostructure of (ZrO₂-NPs/MacroPSi) was demonstrated for the first time as a cation sensor for different solutions. (ZrO₂-NPs/MacroPSi) EGFET ions sensor improved voltage sensitivity of 67, 62, 44, and 38.2 mV/dec, for Na⁺, K⁺, Ca²⁺, and Mg²⁺, respectively. The current sensitivity of EGFET was found to be 1.22, 1.06, 0.605, and 0.49 (µA)^1/2/dec, for Na⁺, K⁺, Ca²⁺, and Mg²⁺, respectively. The results demonstrated that the current/voltage sensitivity values are highly linear. The ZrO₂/Psi-based EGFET cation sensor's excellent measured sensitivity makes it a viable candidate for use as a sensor in a variety of ions detection applications.

Keywords: ZrO2 nanoparticle; ZrO2/MacroPSi; EGFET; Cations sensor; Sensitivity

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02554-w

Chemical Papers 77 (3) 1351–1360 (2023)