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Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors

For highly sensitive pH sensing, an electrolyte insulator semiconductor (EIS) device, based on ZnO nanorod-sensing membrane layers doped with magnesium, was proposed. ZnO nanorod samples prepared via a hydrothermal process with different Mg molar ratios (0–5%) were characterized to explore the impac...

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Autores principales: Al-Khalqi, Ensaf Mohammed, Abdul Hamid, Muhammad Azmi, Al-Hardan, Naif H., Keng, Lim Kar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8002599/
https://www.ncbi.nlm.nih.gov/pubmed/33802968
http://dx.doi.org/10.3390/s21062110
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author Al-Khalqi, Ensaf Mohammed
Abdul Hamid, Muhammad Azmi
Al-Hardan, Naif H.
Keng, Lim Kar
author_facet Al-Khalqi, Ensaf Mohammed
Abdul Hamid, Muhammad Azmi
Al-Hardan, Naif H.
Keng, Lim Kar
author_sort Al-Khalqi, Ensaf Mohammed
collection PubMed
description For highly sensitive pH sensing, an electrolyte insulator semiconductor (EIS) device, based on ZnO nanorod-sensing membrane layers doped with magnesium, was proposed. ZnO nanorod samples prepared via a hydrothermal process with different Mg molar ratios (0–5%) were characterized to explore the impact of magnesium content on the structural and optical characteristics and sensing performance by X-ray diffraction analysis (XRD), atomic force microscopy (AFM), and photoluminescence (PL). The results indicated that the ZnO nanorods doped with 3% Mg had a high hydrogen ion sensitivity (83.77 mV/pH), linearity (96.06%), hysteresis (3 mV), and drift (0.218 mV/h) due to the improved crystalline quality and the surface hydroxyl group role of ZnO. In addition, the detection characteristics varied with the doping concentration and were suitable for developing biomedical detection applications with different detection elements.
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spelling pubmed-80025992021-03-28 Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors Al-Khalqi, Ensaf Mohammed Abdul Hamid, Muhammad Azmi Al-Hardan, Naif H. Keng, Lim Kar Sensors (Basel) Article For highly sensitive pH sensing, an electrolyte insulator semiconductor (EIS) device, based on ZnO nanorod-sensing membrane layers doped with magnesium, was proposed. ZnO nanorod samples prepared via a hydrothermal process with different Mg molar ratios (0–5%) were characterized to explore the impact of magnesium content on the structural and optical characteristics and sensing performance by X-ray diffraction analysis (XRD), atomic force microscopy (AFM), and photoluminescence (PL). The results indicated that the ZnO nanorods doped with 3% Mg had a high hydrogen ion sensitivity (83.77 mV/pH), linearity (96.06%), hysteresis (3 mV), and drift (0.218 mV/h) due to the improved crystalline quality and the surface hydroxyl group role of ZnO. In addition, the detection characteristics varied with the doping concentration and were suitable for developing biomedical detection applications with different detection elements. MDPI 2021-03-17 /pmc/articles/PMC8002599/ /pubmed/33802968 http://dx.doi.org/10.3390/s21062110 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Al-Khalqi, Ensaf Mohammed
Abdul Hamid, Muhammad Azmi
Al-Hardan, Naif H.
Keng, Lim Kar
Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors
title Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors
title_full Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors
title_fullStr Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors
title_full_unstemmed Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors
title_short Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte–Insulator–Semiconductor (EIS) Sensors
title_sort highly sensitive magnesium-doped zno nanorod ph sensors based on electrolyte–insulator–semiconductor (eis) sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8002599/
https://www.ncbi.nlm.nih.gov/pubmed/33802968
http://dx.doi.org/10.3390/s21062110
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